51369961555285 has 32 divisors (see below), whose sum is σ = 64595820902400. Its totient is φ = 39165074108160.

The previous prime is 51369961555273. The next prime is 51369961555369. The reversal of 51369961555285 is 58255516996315.

It is a de Polignac number, because none of the positive numbers 2^k-51369961555285 is a prime.

It is a super-2 number, since 2×51369961555285² (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 31 ways as a sum of consecutive naturals, for example, 38369055 + ... + 39685315.

It is an arithmetic number, because the mean of its divisors is an integer number (2018619403200).

Almost surely, 2^{51369961555285} is an apocalyptic number.

It is an amenable number.

51369961555285 is a deficient number, since it is larger than the sum of its proper divisors (13225859347115).

51369961555285 is a wasteful number, since it uses less digits than its factorization.

51369961555285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1319781.

The product of its digits is 437400000, while the sum is 70.

The spelling of 51369961555285 in words is "fifty-one trillion, three hundred sixty-nine billion, nine hundred sixty-one million, five hundred fifty-five thousand, two hundred eighty-five".