64235283840 has 1536 divisors, whose sum is σ = 290043936000. Its totient is φ = 13005619200.

The previous prime is 64235283817. The next prime is 64235283841. The reversal of 64235283840 is 4838253246.

64235283840 is a `hidden beast` number, since 6 + 42 + 3 + 528 + 3 + 84 + 0 = 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 (64235283841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 1053037410 + ... + 1053037470.

Almost surely, 2^64235283840 is an apocalyptic number.

64235283840 is a gapful number since it is divisible by the number (60) 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 64235283840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (145021968000).

64235283840 is an abundant number, since it is smaller than the sum of its proper divisors (225808652160).

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

64235283840 is a wasteful number, since it uses less digits than its factorization.

64235283840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161 (or 132 counting only the distinct ones).

The product of its (nonzero) digits is 1105920, while the sum is 45.

The spelling of 64235283840 in words is "sixty-four billion, two hundred thirty-five million, two hundred eighty-three thousand, eight hundred forty".