51161637624 has 16 divisors (see below), whose sum is σ = 127904094120. Its totient is φ = 17053879200.

The previous prime is 51161637599. The next prime is 51161637643. The reversal of 51161637624 is 42673616115.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1065867427 + ... + 1065867474.

Almost surely, 2^51161637624 is an apocalyptic number.

It is an amenable number.

51161637624 is an abundant number, since it is smaller than the sum of its proper divisors (76742456496).

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

51161637624 is a wasteful number, since it uses less digits than its factorization.

51161637624 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2131734910 (or 2131734906 counting only the distinct ones).

The product of its digits is 181440, while the sum is 42.

The spelling of 51161637624 in words is "fifty-one billion, one hundred sixty-one million, six hundred thirty-seven thousand, six hundred twenty-four".