561345651 has 6 divisors (see below), whose sum is σ = 810832620. Its totient is φ = 374230428.

The previous prime is 561345601. The next prime is 561345677. The reversal of 561345651 is 156543165.

561345651 is a `hidden beast` number, since 5 + 61 + 34 + 565 + 1 = 666.

It is not a de Polignac number, because 561345651 - 2¹⁵ = 561312883 is a prime.

It is a super-2 number, since 2×561345651² = 630217879793227602, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (561345601) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 31185861 + ... + 31185878.

It is an arithmetic number, because the mean of its divisors is an integer number (135138770).

Almost surely, 2^561345651 is an apocalyptic number.

561345651 is a deficient number, since it is larger than the sum of its proper divisors (249486969).

561345651 is a wasteful number, since it uses less digits than its factorization.

561345651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62371745 (or 62371742 counting only the distinct ones).

The product of its digits is 54000, while the sum is 36.

The square root of 561345651 is about 23692.7341393939. The cubic root of 561345651 is about 824.9167475220.

The spelling of 561345651 in words is "five hundred sixty-one million, three hundred forty-five thousand, six hundred fifty-one".