51813745612572 has 12 divisors (see below), whose sum is σ = 120898739762696. Its totient is φ = 17271248537520.

The previous prime is 51813745612571. The next prime is 51813745612703. The reversal of 51813745612572 is 27521654731815.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51813745612571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2158906067179 + ... + 2158906067202.

Almost surely, 2^{51813745612572} is an apocalyptic number.

It is an amenable number.

51813745612572 is an abundant number, since it is smaller than the sum of its proper divisors (69084994150124).

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

51813745612572 is a wasteful number, since it uses less digits than its factorization.

51813745612572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4317812134388 (or 4317812134386 counting only the distinct ones).

The product of its digits is 14112000, while the sum is 57.

The spelling of 51813745612572 in words is "fifty-one trillion, eight hundred thirteen billion, seven hundred forty-five million, six hundred twelve thousand, five hundred seventy-two".