51646035504 has 80 divisors (see below), whose sum is σ = 157736689920. Its totient is φ = 14247179520.

The previous prime is 51646035487. The next prime is 51646035541. The reversal of 51646035504 is 40553064615.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2640402 + ... + 2659889.

It is an arithmetic number, because the mean of its divisors is an integer number (1971708624).

Almost surely, 2^51646035504 is an apocalyptic number.

It is an amenable number.

51646035504 is an abundant number, since it is smaller than the sum of its proper divisors (106090654416).

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

51646035504 is a wasteful number, since it uses less digits than its factorization.

51646035504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5300338 (or 5300332 counting only the distinct ones).

The product of its (nonzero) digits is 216000, while the sum is 39.

The spelling of 51646035504 in words is "fifty-one billion, six hundred forty-six million, thirty-five thousand, five hundred four".