51494331985504 has 24 divisors (see below), whose sum is σ = 101661860175120. Its totient is φ = 25675446861696.

The previous prime is 51494331985477. The next prime is 51494331985511. The reversal of 51494331985504 is 40558913349415.

It is a super-2 number, since 2×51494331985504² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2241211179 + ... + 2241234154.

It is an arithmetic number, because the mean of its divisors is an integer number (4235910840630).

Almost surely, 2^{51494331985504} is an apocalyptic number.

It is an amenable number.

51494331985504 is a deficient number, since it is larger than the sum of its proper divisors (50167528189616).

51494331985504 is a wasteful number, since it uses less digits than its factorization.

51494331985504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4482445702 (or 4482445694 counting only the distinct ones).

The product of its (nonzero) digits is 46656000, while the sum is 61.

The spelling of 51494331985504 in words is "fifty-one trillion, four hundred ninety-four billion, three hundred thirty-one million, nine hundred eighty-five thousand, five hundred four".