64699332987904 has 44 divisors (see below), whose sum is σ = 129337032737304. Its totient is φ = 32349278879744.

The previous prime is 64699332987881. The next prime is 64699332987907. The reversal of 64699332987904 is 40978923399646.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (64699332987907) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 97468392 + ... + 98129944.

Almost surely, 2^{64699332987904} is an apocalyptic number.

64699332987904 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

64699332987904 is a deficient number, since it is larger than the sum of its proper divisors (64637699749400).

64699332987904 is an equidigital number, since it uses as much as digits as its factorization.

64699332987904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 757080 (or 757062 counting only the distinct ones).

The product of its (nonzero) digits is 3809369088, while the sum is 79.

The spelling of 64699332987904 in words is "sixty-four trillion, six hundred ninety-nine billion, three hundred thirty-two million, nine hundred eighty-seven thousand, nine hundred four".