2556616969 has 9 divisors (see below), whose sum is σ = 2603722087. Its totient is φ = 2510351824.

The previous prime is 2556616967. The next prime is 2556617059. The reversal of 2556616969 is 9696166552.

The square root of 2556616969 is 50563.

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

It can be written as a sum of positive squares in only one way, i.e., 2369255625 + 187361344 = 48675^2 + 13688^2 .

It is not a de Polignac number, because 2556616969 - 2¹ = 2556616967 is a prime.

It is a super-2 number, since 2×2556616969² = 13072580652357493922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2556616967) 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, 2982789 + ... + 2983645.

Almost surely, 2^2556616969 is an apocalyptic number.

2556616969 is the 50563-rd square number.

2556616969 is the 25282-nd centered octagonal number.

It is an amenable number.

2556616969 is a deficient number, since it is larger than the sum of its proper divisors (47105118).

2556616969 is an frugal number, since it uses more digits than its factorization.

2556616969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1832 (or 916 counting only the distinct ones).

The product of its digits is 5248800, while the sum is 55.

The cubic root of 2556616969 is about 1367.3778977839.

The spelling of 2556616969 in words is "two billion, five hundred fifty-six million, six hundred sixteen thousand, nine hundred sixty-nine".