51613351556 has 48 divisors (see below), whose sum is σ = 99014496000. Its totient is φ = 23397783552.

The previous prime is 51613351511. The next prime is 51613351567. The reversal of 51613351556 is 65515331615.

It is a happy number.

It is a super-2 number, since 2×51613351556² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 760295 + ... + 825393.

It is an arithmetic number, because the mean of its divisors is an integer number (2062802000).

Almost surely, 2^51613351556 is an apocalyptic number.

It is an amenable number.

51613351556 is a deficient number, since it is larger than the sum of its proper divisors (47401144444).

51613351556 is a wasteful number, since it uses less digits than its factorization.

51613351556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65388 (or 65386 counting only the distinct ones).

The product of its digits is 202500, while the sum is 41.

The spelling of 51613351556 in words is "fifty-one billion, six hundred thirteen million, three hundred fifty-one thousand, five hundred fifty-six".