611564656225 has 12 divisors (see below), whose sum is σ = 758478954240. Its totient is φ = 489162189200.

The previous prime is 611564656217. The next prime is 611564656259. The reversal of 611564656225 is 522656465116.

It is not a de Polignac number, because 611564656225 - 2³ = 611564656217 is a prime.

It is a super-2 number, since 2×611564656225² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2098885 + ... + 2372434.

It is an arithmetic number, because the mean of its divisors is an integer number (63206579520).

Almost surely, 2^611564656225 is an apocalyptic number.

It is an amenable number.

611564656225 is a deficient number, since it is larger than the sum of its proper divisors (146914298015).

611564656225 is a wasteful number, since it uses less digits than its factorization.

611564656225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4476800 (or 4476795 counting only the distinct ones).

The product of its digits is 2592000, while the sum is 49.

The spelling of 611564656225 in words is "six hundred eleven billion, five hundred sixty-four million, six hundred fifty-six thousand, two hundred twenty-five".