561456677631 has 32 divisors (see below), whose sum is σ = 783310694400. Its totient is φ = 357044271584.

The previous prime is 561456677603. The next prime is 561456677633. The reversal of 561456677631 is 136776654165.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 561456677631 - 2⁷ = 561456677503 is a prime.

It is a super-3 number, since 3×561456677631³ (a number of 36 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561456677633) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 64538320 + ... + 64547018.

It is an arithmetic number, because the mean of its divisors is an integer number (24478459200).

Almost surely, 2^561456677631 is an apocalyptic number.

561456677631 is a deficient number, since it is larger than the sum of its proper divisors (221854016769).

561456677631 is a wasteful number, since it uses less digits than its factorization.

561456677631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11195.

The product of its digits is 19051200, while the sum is 57.

The spelling of 561456677631 in words is "five hundred sixty-one billion, four hundred fifty-six million, six hundred seventy-seven thousand, six hundred thirty-one".