51265537563 has 16 divisors (see below), whose sum is σ = 69172208000. Its totient is φ = 33770278080.

The previous prime is 51265537541. The next prime is 51265537567. The reversal of 51265537563 is 36573556215.

It is not a de Polignac number, because 51265537563 - 2⁹ = 51265537051 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51265537567) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 203338 + ... + 379311.

It is an arithmetic number, because the mean of its divisors is an integer number (4323263000).

Almost surely, 2^51265537563 is an apocalyptic number.

51265537563 is a deficient number, since it is larger than the sum of its proper divisors (17906670437).

51265537563 is a wasteful number, since it uses less digits than its factorization.

51265537563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 583002.

The product of its digits is 2835000, while the sum is 48.

The spelling of 51265537563 in words is "fifty-one billion, two hundred sixty-five million, five hundred thirty-seven thousand, five hundred sixty-three".