51520977495 has 288 divisors, whose sum is σ = 106776828288. Its totient is φ = 22876618752.

The previous prime is 51520977493. The next prime is 51520977533. The reversal of 51520977495 is 59477902515.

It is a happy number.

51520977495 is a `hidden beast` number, since 5 + 1 + 520 + 9 + 77 + 49 + 5 = 666.

It is not a de Polignac number, because 51520977495 - 2¹ = 51520977493 is a prime.

It is a super-2 number, since 2×51520977495² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51520977493) by changing a digit.

It is a polite number, since it can be written in 287 ways as a sum of consecutive naturals, for example, 500203614 + ... + 500203716.

It is an arithmetic number, because the mean of its divisors is an integer number (370752876).

Almost surely, 2^51520977495 is an apocalyptic number.

51520977495 is an abundant number, since it is smaller than the sum of its proper divisors (55255850793).

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

51520977495 is a wasteful number, since it uses less digits than its factorization.

51520977495 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 283 (or 267 counting only the distinct ones).

The product of its (nonzero) digits is 3969000, while the sum is 54.

It can be divided in two parts, 515209 and 77495, that added together give a cube (592704 = 84³).

The spelling of 51520977495 in words is "fifty-one billion, five hundred twenty million, nine hundred seventy-seven thousand, four hundred ninety-five".