51515623090 has 32 divisors (see below), whose sum is σ = 98362387584. Its totient is φ = 19358626560.

The previous prime is 51515623079. The next prime is 51515623097. The reversal of 51515623090 is 9032651515.

It is a super-2 number, since 2×51515623090² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51515623097) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 184006 + ... + 369985.

It is an arithmetic number, because the mean of its divisors is an integer number (3073824612).

Almost surely, 2^51515623090 is an apocalyptic number.

51515623090 is a deficient number, since it is larger than the sum of its proper divisors (46846764494).

51515623090 is a wasteful number, since it uses less digits than its factorization.

51515623090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 554562.

The product of its (nonzero) digits is 40500, while the sum is 37.

The spelling of 51515623090 in words is "fifty-one billion, five hundred fifteen million, six hundred twenty-three thousand, ninety".