115021585565 has 4 divisors (see below), whose sum is σ = 138025902684. Its totient is φ = 92017268448.

The previous prime is 115021585487. The next prime is 115021585589. The reversal of 115021585565 is 565585120511.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 88609810276 + 26411775289 = 297674^2 + 162517^2 .

It is a cyclic number.

It is not a de Polignac number, because 115021585565 - 2²⁶ = 114954476701 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 3 ways as a sum of consecutive naturals, for example, 11502158552 + ... + 11502158561.

It is an arithmetic number, because the mean of its divisors is an integer number (34506475671).

Almost surely, 2^115021585565 is an apocalyptic number.

It is an amenable number.

115021585565 is a deficient number, since it is larger than the sum of its proper divisors (23004317119).

115021585565 is an equidigital number, since it uses as much as digits as its factorization.

115021585565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23004317118.

The product of its (nonzero) digits is 300000, while the sum is 44.

The spelling of 115021585565 in words is "one hundred fifteen billion, twenty-one million, five hundred eighty-five thousand, five hundred sixty-five".