51354440536525 has 48 divisors (see below), whose sum is σ = 77138415932544. Its totient is φ = 33108254484480.

The previous prime is 51354440536507. The next prime is 51354440536549. The reversal of 51354440536525 is 52563504445315.

It is a de Polignac number, because none of the positive numbers 2^k-51354440536525 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 6221487 + ... + 11891836.

It is an arithmetic number, because the mean of its divisors is an integer number (1607050331928).

Almost surely, 2^{51354440536525} is an apocalyptic number.

It is an amenable number.

51354440536525 is a deficient number, since it is larger than the sum of its proper divisors (25783975396019).

51354440536525 is a wasteful number, since it uses less digits than its factorization.

51354440536525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18114310 (or 18114305 counting only the distinct ones).

The product of its (nonzero) digits is 21600000, while the sum is 52.

The spelling of 51354440536525 in words is "fifty-one trillion, three hundred fifty-four billion, four hundred forty million, five hundred thirty-six thousand, five hundred twenty-five".