556870545 has 120 divisors (see below), whose sum is σ = 1267282368. Its totient is φ = 231336000.

The previous prime is 556870541. The next prime is 556870571. The reversal of 556870545 is 545078655.

It is not a de Polignac number, because 556870545 - 2² = 556870541 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 556870545.

It is not an unprimeable number, because it can be changed into a prime (556870541) by changing a digit.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 217020 + ... + 219570.

Almost surely, 2^556870545 is an apocalyptic number.

556870545 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

556870545 is an abundant number, since it is smaller than the sum of its proper divisors (710411823).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

556870545 is a wasteful number, since it uses less digits than its factorization.

556870545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2593 (or 2577 counting only the distinct ones).

The product of its (nonzero) digits is 840000, while the sum is 45.

The square root of 556870545 is about 23598.1046908433. The cubic root of 556870545 is about 822.7187889364.

The spelling of 556870545 in words is "five hundred fifty-six million, eight hundred seventy thousand, five hundred forty-five".