365650640640 has 720 divisors, whose sum is σ = 1383629385600. Its totient is φ = 91946409984.

The previous prime is 365650640603. The next prime is 365650640647. The reversal of 365650640640 is 46046056563.

365650640640 is a `hidden beast` number, since 3 + 6 + 565 + 0 + 6 + 40 + 6 + 40 = 666.

It is a tau number, because it is divible by the number of its divisors (720).

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (365650640647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 825396259 + ... + 825396701.

It is an arithmetic number, because the mean of its divisors is an integer number (1921707480).

Almost surely, 2^365650640640 is an apocalyptic number.

365650640640 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 365650640640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (691814692800).

365650640640 is an abundant number, since it is smaller than the sum of its proper divisors (1017978744960).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

365650640640 is a wasteful number, since it uses less digits than its factorization.

365650640640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 914 (or 891 counting only the distinct ones).

The product of its (nonzero) digits is 1555200, while the sum is 45.

The spelling of 365650640640 in words is "three hundred sixty-five billion, six hundred fifty million, six hundred forty thousand, six hundred forty".