64157292987794 has 16 divisors (see below), whose sum is σ = 98905883006808. Its totient is φ = 31189875357312.

The previous prime is 64157292987719. The next prime is 64157292987847. The reversal of 64157292987794 is 49778929275146.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 59085280023025 + 5072012964769 = 7686695^2 + 2252113^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 302402837 + ... + 302614920.

Almost surely, 2^{64157292987794} is an apocalyptic number.

64157292987794 is a deficient number, since it is larger than the sum of its proper divisors (34748590019014).

64157292987794 is a wasteful number, since it uses less digits than its factorization.

64157292987794 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 605019229.

The product of its digits is 3840721920, while the sum is 80.

The spelling of 64157292987794 in words is "sixty-four trillion, one hundred fifty-seven billion, two hundred ninety-two million, nine hundred eighty-seven thousand, seven hundred ninety-four".