52117903581 has 16 divisors (see below), whose sum is σ = 71920565760. Its totient is φ = 33531382080.

The previous prime is 52117903553. The next prime is 52117903597. The reversal of 52117903581 is 18530971125.

It is not a de Polignac number, because 52117903581 - 2¹¹ = 52117901533 is a prime.

It is a super-2 number, since 2×52117903581² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52117903081) 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, 46671 + ... + 326211.

It is an arithmetic number, because the mean of its divisors is an integer number (4495035360).

Almost surely, 2^52117903581 is an apocalyptic number.

It is an amenable number.

52117903581 is a deficient number, since it is larger than the sum of its proper divisors (19802662179).

52117903581 is a wasteful number, since it uses less digits than its factorization.

52117903581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 281716.

The product of its (nonzero) digits is 75600, while the sum is 42.

The spelling of 52117903581 in words is "fifty-two billion, one hundred seventeen million, nine hundred three thousand, five hundred eighty-one".