64564696900 has 36 divisors (see below), whose sum is σ = 152842248720. Its totient is φ = 23478071200.

The previous prime is 64564696891. The next prime is 64564696901. The reversal of 64564696900 is 969646546.

It is a super-2 number, since 2×64564696900² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (55).

It is not an unprimeable number, because it can be changed into a prime (64564696901) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 29346490 + ... + 29348689.

It is an arithmetic number, because the mean of its divisors is an integer number (4245618020).

Almost surely, 2^64564696900 is an apocalyptic number.

It is an amenable number.

64564696900 is an abundant number, since it is smaller than the sum of its proper divisors (88277551820).

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

64564696900 is a wasteful number, since it uses less digits than its factorization.

64564696900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58695204 (or 58695197 counting only the distinct ones).

The product of its (nonzero) digits is 8398080, while the sum is 55.

The spelling of 64564696900 in words is "sixty-four billion, five hundred sixty-four million, six hundred ninety-six thousand, nine hundred".