64700071873136 has 40 divisors (see below), whose sum is σ = 146188209055200. Its totient is φ = 27728602228992.

The previous prime is 64700071873097. The next prime is 64700071873153. The reversal of 64700071873136 is 63137817000746.

It is a happy number.

It is a congruent number.

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, 5894680361 + ... + 5894691336.

It is an arithmetic number, because the mean of its divisors is an integer number (3654705226380).

Almost surely, 2^{64700071873136} is an apocalyptic number.

It is an amenable number.

64700071873136 is an abundant number, since it is smaller than the sum of its proper divisors (81488137182064).

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

64700071873136 is a wasteful number, since it uses less digits than its factorization.

64700071873136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11789371726 (or 11789371706 counting only the distinct ones).

The product of its (nonzero) digits is 3556224, while the sum is 53.

The spelling of 64700071873136 in words is "sixty-four trillion, seven hundred billion, seventy-one million, eight hundred seventy-three thousand, one hundred thirty-six".