51564055521303 has 24 divisors (see below), whose sum is σ = 80250919021728. Its totient is φ = 31715836633152.

The previous prime is 51564055521271. The next prime is 51564055521311. The reversal of 51564055521303 is 30312555046515.

51564055521303 is a `hidden beast` number, since 5 + 1 + 5 + 6 + 40 + 55 + 521 + 30 + 3 = 666.

It is not a de Polignac number, because 51564055521303 - 2⁵ = 51564055521271 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51564055521203) 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, 110111475 + ... + 110578772.

It is an arithmetic number, because the mean of its divisors is an integer number (3343788292572).

Almost surely, 2^{51564055521303} is an apocalyptic number.

51564055521303 is a deficient number, since it is larger than the sum of its proper divisors (28686863500425).

51564055521303 is a wasteful number, since it uses less digits than its factorization.

51564055521303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220692263 (or 220692260 counting only the distinct ones).

The product of its (nonzero) digits is 1350000, while the sum is 45.

The spelling of 51564055521303 in words is "fifty-one trillion, five hundred sixty-four billion, fifty-five million, five hundred twenty-one thousand, three hundred three".