51147602516 has 12 divisors (see below), whose sum is σ = 89594960532. Its totient is φ = 25549042368.

The previous prime is 51147602509. The next prime is 51147602533. The reversal of 51147602516 is 61520674115.

51147602516 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 43658430916 + 7489171600 = 208946^2 + 86540^2 .

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 51147602516.

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, 6185075 + ... + 6193338.

It is an arithmetic number, because the mean of its divisors is an integer number (7466246711).

Almost surely, 2^51147602516 is an apocalyptic number.

It is an amenable number.

51147602516 is a deficient number, since it is larger than the sum of its proper divisors (38447358016).

51147602516 is a wasteful number, since it uses less digits than its factorization.

51147602516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12379450 (or 12379448 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 38.

The spelling of 51147602516 in words is "fifty-one billion, one hundred forty-seven million, six hundred two thousand, five hundred sixteen".