64401901696 has 32 divisors (see below), whose sum is σ = 139964363280. Its totient is φ = 29273591040.

The previous prime is 64401901651. The next prime is 64401901717. The reversal of 64401901696 is 69610910446.

It is a tau number, because it is divible by the number of its divisors (32).

It is a super-2 number, since 2×64401901696² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 22868586 + ... + 22871401.

Almost surely, 2^64401901696 is an apocalyptic number.

It is an amenable number.

64401901696 is an abundant number, since it is smaller than the sum of its proper divisors (75562461584).

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

64401901696 is a wasteful number, since it uses less digits than its factorization.

64401901696 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45740012 (or 45740000 counting only the distinct ones).

The product of its (nonzero) digits is 279936, while the sum is 46.

The spelling of 64401901696 in words is "sixty-four billion, four hundred one million, nine hundred one thousand, six hundred ninety-six".