51515142788 has 24 divisors (see below), whose sum is σ = 90385545600. Its totient is φ = 25690767008.

The previous prime is 51515142703. The next prime is 51515142821. The reversal of 51515142788 is 88724151515.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 3631253 + ... + 3645411.

It is an arithmetic number, because the mean of its divisors is an integer number (3766064400).

Almost surely, 2^51515142788 is an apocalyptic number.

It is an amenable number.

51515142788 is a deficient number, since it is larger than the sum of its proper divisors (38870402812).

51515142788 is a wasteful number, since it uses less digits than its factorization.

51515142788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16459 (or 16457 counting only the distinct ones).

The product of its digits is 448000, while the sum is 47.

It can be divided in two parts, 515151427 and 88, that added together give a palindrome (515151515).

The spelling of 51515142788 in words is "fifty-one billion, five hundred fifteen million, one hundred forty-two thousand, seven hundred eighty-eight".