51121551602 has 12 divisors (see below), whose sum is σ = 84287186718. Its totient is φ = 23237068800.

The previous prime is 51121551553. The next prime is 51121551617. The reversal of 51121551602 is 20615512115.

It can be written as a sum of positive squares in only one way, i.e., 50597553721 + 523997881 = 224939^2 + 22891^2 .

It is a super-2 number, since 2×51121551602² (a number of 22 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (29) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 105622799 + ... + 105623282.

Almost surely, 2^51121551602 is an apocalyptic number.

51121551602 is a deficient number, since it is larger than the sum of its proper divisors (33165635116).

51121551602 is a wasteful number, since it uses less digits than its factorization.

51121551602 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211246105 (or 211246094 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 29.

The spelling of 51121551602 in words is "fifty-one billion, one hundred twenty-one million, five hundred fifty-one thousand, six hundred two".