51151611680 has 48 divisors (see below), whose sum is σ = 130141509624. Its totient is φ = 18886748160.

The previous prime is 51151611673. The next prime is 51151611689. The reversal of 51151611680 is 8611615115.

It can be written as a sum of positive squares in 4 ways, for example, as 34223520016 + 16928091664 = 184996^2 + 130108^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 51151611680.

It is not an unprimeable number, because it can be changed into a prime (51151611689) 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, 12293981 + ... + 12298140.

Almost surely, 2^51151611680 is an apocalyptic number.

It is an amenable number.

51151611680 is an abundant number, since it is smaller than the sum of its proper divisors (78989897944).

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

51151611680 is a wasteful number, since it uses less digits than its factorization.

51151611680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24592149 (or 24592141 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 35.

The spelling of 51151611680 in words is "fifty-one billion, one hundred fifty-one million, six hundred eleven thousand, six hundred eighty".