51130661640642 has 48 divisors (see below), whose sum is σ = 113141107946880. Its totient is φ = 16680789362016.

The previous prime is 51130661640623. The next prime is 51130661640673. The reversal of 51130661640642 is 24604616603115.

51130661640642 is a `hidden beast` number, since 5 + 1 + 130 + 66 + 16 + 406 + 42 = 666.

It is a super-2 number, since 2×51130661640642² (a number of 28 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 205625484 + ... + 205873992.

It is an arithmetic number, because the mean of its divisors is an integer number (2357106415560).

Almost surely, 2^{51130661640642} is an apocalyptic number.

51130661640642 is an abundant number, since it is smaller than the sum of its proper divisors (62010446306238).

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

51130661640642 is a wasteful number, since it uses less digits than its factorization.

51130661640642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 491767 (or 491764 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 45.

The spelling of 51130661640642 in words is "fifty-one trillion, one hundred thirty billion, six hundred sixty-one million, six hundred forty thousand, six hundred forty-two".