8557156456 has 8 divisors (see below), whose sum is σ = 16044668370. Its totient is φ = 4278578224.

The previous prime is 8557156441. The next prime is 8557156457. The reversal of 8557156456 is 6546517558.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 8129907556 + 427248900 = 90166^2 + 20670^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×8557156456² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (8557156457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 534822271 + ... + 534822286.

Almost surely, 2^8557156456 is an apocalyptic number.

It is an amenable number.

8557156456 is a deficient number, since it is larger than the sum of its proper divisors (7487511914).

8557156456 is a wasteful number, since it uses less digits than its factorization.

8557156456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1069644563 (or 1069644559 counting only the distinct ones).

The product of its digits is 5040000, while the sum is 52.

The square root of 8557156456 is about 92504.8996323979. The cubic root of 8557156456 is about 2045.3917073362.

The spelling of 8557156456 in words is "eight billion, five hundred fifty-seven million, one hundred fifty-six thousand, four hundred fifty-six".