51125161867506 has 48 divisors (see below), whose sum is σ = 110862243423360. Its totient is φ = 17027716963680.

The previous prime is 51125161867477. The next prime is 51125161867511. The reversal of 51125161867506 is 60576816152115.

51125161867506 is a `hidden beast` number, since 5 + 1 + 1 + 2 + 51 + 6 + 1 + 86 + 7 + 506 = 666.

It is a super-2 number, since 2×51125161867506² (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, 113087991 + ... + 113539173.

It is an arithmetic number, because the mean of its divisors is an integer number (2309630071320).

Almost surely, 2^{51125161867506} is an apocalyptic number.

51125161867506 is an abundant number, since it is smaller than the sum of its proper divisors (59737081555854).

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

51125161867506 is a wasteful number, since it uses less digits than its factorization.

51125161867506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 456351 (or 456348 counting only the distinct ones).

The product of its (nonzero) digits is 3024000, while the sum is 54.

The spelling of 51125161867506 in words is "fifty-one trillion, one hundred twenty-five billion, one hundred sixty-one million, eight hundred sixty-seven thousand, five hundred six".