561125636431 has 2 divisors, whose sum is σ = 561125636432. Its totient is φ = 561125636430.

The previous prime is 561125636419. The next prime is 561125636527. The reversal of 561125636431 is 134636521165.

561125636431 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 561125636431 - 2⁵ = 561125636399 is a prime.

It is a super-2 number, since 2×561125636431² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (561125631431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 280562818215 + 280562818216.

It is an arithmetic number, because the mean of its divisors is an integer number (280562818216).

Almost surely, 2^561125636431 is an apocalyptic number.

561125636431 is a deficient number, since it is larger than the sum of its proper divisors (1).

561125636431 is an equidigital number, since it uses as much as digits as its factorization.

561125636431 is an evil number, because the sum of its binary digits is even.

The product of its digits is 388800, while the sum is 43.

The spelling of 561125636431 in words is "five hundred sixty-one billion, one hundred twenty-five million, six hundred thirty-six thousand, four hundred thirty-one".