51576617557 has 8 divisors (see below), whose sum is σ = 52010243712. Its totient is φ = 51143820000.

The previous prime is 51576617551. The next prime is 51576617639. The reversal of 51576617557 is 75571667515.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 51576617557 - 2²⁷ = 51442399829 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51576617498 and 51576617507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51576617551) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 81819 + ... + 331432.

It is an arithmetic number, because the mean of its divisors is an integer number (6501280464).

Almost surely, 2^51576617557 is an apocalyptic number.

It is an amenable number.

51576617557 is a deficient number, since it is larger than the sum of its proper divisors (433626155).

51576617557 is a wasteful number, since it uses less digits than its factorization.

51576617557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 414299.

The product of its digits is 7717500, while the sum is 55.

The spelling of 51576617557 in words is "fifty-one billion, five hundred seventy-six million, six hundred seventeen thousand, five hundred fifty-seven".