611564656264 has 8 divisors (see below), whose sum is σ = 1146683730510. Its totient is φ = 305782328128.

The previous prime is 611564656259. The next prime is 611564656279. The reversal of 611564656264 is 462656465116.

It can be written as a sum of positive squares in only one way, i.e., 519324892164 + 92239764100 = 720642^2 + 303710^2 .

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

It is a super-2 number, since 2×611564656264² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38222791009 + ... + 38222791024.

Almost surely, 2^611564656264 is an apocalyptic number.

It is an amenable number.

611564656264 is a deficient number, since it is larger than the sum of its proper divisors (535119074246).

611564656264 is a wasteful number, since it uses less digits than its factorization.

611564656264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76445582039 (or 76445582035 counting only the distinct ones).

The product of its digits is 6220800, while the sum is 52.

The spelling of 611564656264 in words is "six hundred eleven billion, five hundred sixty-four million, six hundred fifty-six thousand, two hundred sixty-four".