51611145774 has 16 divisors (see below), whose sum is σ = 103614774912. Its totient is φ = 17138301368.

The previous prime is 51611145737. The next prime is 51611145779. The reversal of 51611145774 is 47754111615.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51611145779) 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, 16351764 + ... + 16354919.

It is an arithmetic number, because the mean of its divisors is an integer number (6475923432).

Almost surely, 2^51611145774 is an apocalyptic number.

51611145774 is an abundant number, since it is smaller than the sum of its proper divisors (52003629138).

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

51611145774 is a wasteful number, since it uses less digits than its factorization.

51611145774 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32706951.

The product of its digits is 117600, while the sum is 42.

The spelling of 51611145774 in words is "fifty-one billion, six hundred eleven million, one hundred forty-five thousand, seven hundred seventy-four".