51615506154336 has 48 divisors (see below), whose sum is σ = 135557481250800. Its totient is φ = 17196689023488.

The previous prime is 51615506154301. The next prime is 51615506154367. The reversal of 51615506154336 is 63345160551615.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 132299431 + ... + 132688998.

It is an arithmetic number, because the mean of its divisors is an integer number (2824114192725).

Almost surely, 2^{51615506154336} is an apocalyptic number.

It is an amenable number.

51615506154336 is an abundant number, since it is smaller than the sum of its proper divisors (83941975096464).

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

51615506154336 is a wasteful number, since it uses less digits than its factorization.

51615506154336 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 264990471 (or 264990463 counting only the distinct ones).

The product of its (nonzero) digits is 4860000, while the sum is 51.

The spelling of 51615506154336 in words is "fifty-one trillion, six hundred fifteen billion, five hundred six million, one hundred fifty-four thousand, three hundred thirty-six".