64937698500 has 48 divisors (see below), whose sum is σ = 189098582400. Its totient is φ = 17316719200.

The previous prime is 64937698411. The next prime is 64937698517. The reversal of 64937698500 is 589673946.

It is a happy number.

64937698500 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21644400 + ... + 21647399.

It is an arithmetic number, because the mean of its divisors is an integer number (3939553800).

Almost surely, 2^64937698500 is an apocalyptic number.

64937698500 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

64937698500 is an abundant number, since it is smaller than the sum of its proper divisors (124160883900).

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

64937698500 is a wasteful number, since it uses less digits than its factorization.

64937698500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43291821 (or 43291809 counting only the distinct ones).

The product of its (nonzero) digits is 9797760, while the sum is 57.

The spelling of 64937698500 in words is "sixty-four billion, nine hundred thirty-seven million, six hundred ninety-eight thousand, five hundred".