51036643525 has 24 divisors (see below), whose sum is σ = 72350557760. Its totient is φ = 34984776960.

The previous prime is 51036643513. The next prime is 51036643529. The reversal of 51036643525 is 52534663015.

It is a de Polignac number, because none of the positive numbers 2^k-51036643525 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51036643529) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 489181 + ... + 584269.

Almost surely, 2^51036643525 is an apocalyptic number.

It is an amenable number.

51036643525 is a deficient number, since it is larger than the sum of its proper divisors (21313914235).

51036643525 is a wasteful number, since it uses less digits than its factorization.

51036643525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98173 (or 98168 counting only the distinct ones).

The product of its (nonzero) digits is 324000, while the sum is 40.

The spelling of 51036643525 in words is "fifty-one billion, thirty-six million, six hundred forty-three thousand, five hundred twenty-five".