561416511531 has 16 divisors (see below), whose sum is σ = 794157363200. Its totient is φ = 351786885408.

The previous prime is 561416511511. The next prime is 561416511533. The reversal of 561416511531 is 135115614165.

It is not a de Polignac number, because 561416511531 - 2³⁴ = 544236642347 is a prime.

It is a super-2 number, since 2×561416511531² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 561416511531.

It is not an unprimeable number, because it can be changed into a prime (561416511533) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38769976 + ... + 38784453.

It is an arithmetic number, because the mean of its divisors is an integer number (49634835200).

Almost surely, 2^561416511531 is an apocalyptic number.

561416511531 is a deficient number, since it is larger than the sum of its proper divisors (232740851669).

561416511531 is a wasteful number, since it uses less digits than its factorization.

561416511531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77554578.

The product of its digits is 54000, while the sum is 39.

The spelling of 561416511531 in words is "five hundred sixty-one billion, four hundred sixteen million, five hundred eleven thousand, five hundred thirty-one".