51505612111612 has 24 divisors (see below), whose sum is σ = 91664903272320. Its totient is φ = 25315662350640.

The previous prime is 51505612111493. The next prime is 51505612111619. The reversal of 51505612111612 is 21611121650515.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51505612111619) 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, 6372433 + ... + 11984119.

It is an arithmetic number, because the mean of its divisors is an integer number (3819370969680).

Almost surely, 2^{51505612111612} is an apocalyptic number.

It is an amenable number.

51505612111612 is a deficient number, since it is larger than the sum of its proper divisors (40159291160708).

51505612111612 is a wasteful number, since it uses less digits than its factorization.

51505612111612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5650641 (or 5650639 counting only the distinct ones).

The product of its (nonzero) digits is 18000, while the sum is 37.

The spelling of 51505612111612 in words is "fifty-one trillion, five hundred five billion, six hundred twelve million, one hundred eleven thousand, six hundred twelve".