8557915081 has 9 divisors (see below), whose sum is σ = 8675022573. Its totient is φ = 8442371340.

The previous prime is 8557915043. The next prime is 8557915099. The reversal of 8557915081 is 1805197558.

The square root of 8557915081 is 92509.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 8557915081 - 2¹⁵ = 8557882313 is a prime.

It is a super-2 number, since 2×8557915081² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8557915031) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 7307626 + ... + 7308796.

It is an arithmetic number, because the mean of its divisors is an integer number (963891397).

Almost surely, 2^8557915081 is an apocalyptic number.

8557915081 is the 92509-th square number.

8557915081 is the 46255-th centered octagonal number.

It is an amenable number.

8557915081 is a deficient number, since it is larger than the sum of its proper divisors (117107492).

8557915081 is an frugal number, since it uses more digits than its factorization.

8557915081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2500 (or 1250 counting only the distinct ones).

The product of its (nonzero) digits is 504000, while the sum is 49.

The cubic root of 8557915081 is about 2045.4521495108.

Multiplying 8557915081 by its sum of digits (49), we get a square (419337838969 = 647563²).

The spelling of 8557915081 in words is "eight billion, five hundred fifty-seven million, nine hundred fifteen thousand, eighty-one".