51636612064 has 36 divisors (see below), whose sum is σ = 102087332424. Its totient is φ = 25709753984.

The previous prime is 51636612059. The next prime is 51636612077. The reversal of 51636612064 is 46021663615.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 20845194 + ... + 20847670.

It is an arithmetic number, because the mean of its divisors is an integer number (2835759234).

Almost surely, 2^51636612064 is an apocalyptic number.

It is an amenable number.

51636612064 is a deficient number, since it is larger than the sum of its proper divisors (50450720360).

51636612064 is an frugal number, since it uses more digits than its factorization.

51636612064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5227 (or 2742 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 40.

The spelling of 51636612064 in words is "fifty-one billion, six hundred thirty-six million, six hundred twelve thousand, sixty-four".