64133615394 has 24 divisors (see below), whose sum is σ = 138989081712. Its totient is φ = 21372807960.

The previous prime is 64133615339. The next prime is 64133615459. The reversal of 64133615394 is 49351633146.

It is a happy number.

It is a super-2 number, since 2×64133615394² (a number of 22 digits) contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 343492 + ... + 496239.

It is an arithmetic number, because the mean of its divisors is an integer number (5791211738).

Almost surely, 2^64133615394 is an apocalyptic number.

64133615394 is an abundant number, since it is smaller than the sum of its proper divisors (74855466318).

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

64133615394 is a wasteful number, since it uses less digits than its factorization.

64133615394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 843982 (or 843979 counting only the distinct ones).

The product of its digits is 699840, while the sum is 45.

The spelling of 64133615394 in words is "sixty-four billion, one hundred thirty-three million, six hundred fifteen thousand, three hundred ninety-four".