561500565651 has 12 divisors (see below), whose sum is σ = 811108305280. Its totient is φ = 374309741520.

The previous prime is 561500565623. The next prime is 561500565653. The reversal of 561500565651 is 156565005165.

It is not a de Polignac number, because 561500565651 - 2³⁴ = 544320696467 is a prime.

It is a super-2 number, since 2×561500565651² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 561500565597 and 561500565606.

It is not an unprimeable number, because it can be changed into a prime (561500565653) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1848460 + ... + 2130681.

Almost surely, 2^561500565651 is an apocalyptic number.

561500565651 is a deficient number, since it is larger than the sum of its proper divisors (249607739629).

561500565651 is a wasteful number, since it uses less digits than its factorization.

561500565651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3994826 (or 3994823 counting only the distinct ones).

The product of its (nonzero) digits is 675000, while the sum is 45.

The spelling of 561500565651 in words is "five hundred sixty-one billion, five hundred million, five hundred sixty-five thousand, six hundred fifty-one".