51015021671608 has 32 divisors (see below), whose sum is σ = 95887707210000. Its totient is φ = 25444975691520.

The previous prime is 51015021671573. The next prime is 51015021671623. The reversal of 51015021671608 is 80617612051015.

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, 43948668 + ... + 45094516.

Almost surely, 2^{51015021671608} is an apocalyptic number.

It is an amenable number.

51015021671608 is a deficient number, since it is larger than the sum of its proper divisors (44872685538392).

51015021671608 is a wasteful number, since it uses less digits than its factorization.

51015021671608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1159495 (or 1159491 counting only the distinct ones).

The product of its (nonzero) digits is 100800, while the sum is 43.

The spelling of 51015021671608 in words is "fifty-one trillion, fifteen billion, twenty-one million, six hundred seventy-one thousand, six hundred eight".