64529631936 has 672 divisors, whose sum is σ = 244064332800. Its totient is φ = 16529909760.

The previous prime is 64529631931. The next prime is 64529631937. The reversal of 64529631936 is 63913692546.

64529631936 is a `hidden beast` number, since 6 + 4 + 5 + 296 + 319 + 36 = 666.

It is a tau number, because it is divible by the number of its divisors (672).

It is a super-2 number, since 2×64529631936² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (64529631931) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 73579530 + ... + 73580406.

Almost surely, 2^64529631936 is an apocalyptic number.

64529631936 is a gapful number since it is divisible by the number (66) 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 64529631936, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (122032166400).

64529631936 is an abundant number, since it is smaller than the sum of its proper divisors (179534700864).

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

64529631936 is a wasteful number, since it uses less digits than its factorization.

64529631936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1002 (or 979 counting only the distinct ones).

The product of its digits is 6298560, while the sum is 54.

The spelling of 64529631936 in words is "sixty-four billion, five hundred twenty-nine million, six hundred thirty-one thousand, nine hundred thirty-six".