51615051506 has 8 divisors (see below), whose sum is σ = 77527346160. Its totient is φ = 25772602788.

The previous prime is 51615051463. The next prime is 51615051533. The reversal of 51615051506 is 60515051615.

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

It is a super-2 number, since 2×51615051506² (a number of 22 digits) contains 22 as substring.

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 3 ways as a sum of consecutive naturals, for example, 17459636 + ... + 17462591.

It is an arithmetic number, because the mean of its divisors is an integer number (9690918270).

Almost surely, 2^51615051506 is an apocalyptic number.

51615051506 is a deficient number, since it is larger than the sum of its proper divisors (25912294654).

51615051506 is a wasteful number, since it uses less digits than its factorization.

51615051506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34922968.

The product of its (nonzero) digits is 22500, while the sum is 35.

The spelling of 51615051506 in words is "fifty-one billion, six hundred fifteen million, fifty-one thousand, five hundred six".