52307766421581 has 24 divisors (see below), whose sum is σ = 76843378654560. Its totient is φ = 31626016201120.

The previous prime is 52307766421567. The next prime is 52307766421627. The reversal of 52307766421581 is 18512466770325.

It is a happy number.

It is not a de Polignac number, because 52307766421581 - 2⁵ = 52307766421549 is a prime.

It is a super-2 number, since 2×52307766421581² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52307766421381) 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, 171803190 + ... + 172107383.

It is an arithmetic number, because the mean of its divisors is an integer number (3201807443940).

Almost surely, 2^{52307766421581} is an apocalyptic number.

It is an amenable number.

52307766421581 is a deficient number, since it is larger than the sum of its proper divisors (24535612232979).

52307766421581 is a wasteful number, since it uses less digits than its factorization.

52307766421581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 343911017 (or 343911006 counting only the distinct ones).

The product of its (nonzero) digits is 16934400, while the sum is 57.

The spelling of 52307766421581 in words is "fifty-two trillion, three hundred seven billion, seven hundred sixty-six million, four hundred twenty-one thousand, five hundred eighty-one".