75322736640 has 540 divisors, whose sum is σ = 276550596504. Its totient is φ = 18961661952.

The previous prime is 75322736623. The next prime is 75322736647. The reversal of 75322736640 is 4663722357.

75322736640 is a `hidden beast` number, since 7 + 532 + 2 + 73 + 6 + 6 + 40 = 666.

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 (75322736647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 266157939 + ... + 266158221.

Almost surely, 2^75322736640 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 75322736640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (138275298252).

75322736640 is an abundant number, since it is smaller than the sum of its proper divisors (201227859864).

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

75322736640 is a wasteful number, since it uses less digits than its factorization.

75322736640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 360 (or 312 counting only the distinct ones).

The product of its (nonzero) digits is 1270080, while the sum is 45.

The spelling of 75322736640 in words is "seventy-five billion, three hundred twenty-two million, seven hundred thirty-six thousand, six hundred forty".