561437808627131 has 4 divisors (see below), whose sum is σ = 561456784484232. Its totient is φ = 561418832770032.

The previous prime is 561437808627049. The next prime is 561437808627239. The reversal of 561437808627131 is 131726808734165.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 561437808627131 - 2¹⁸ = 561437808364987 is a prime.

It is a super-2 number, since 2×561437808627131² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (561437808627431) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9487884170 + ... + 9487943343.

It is an arithmetic number, because the mean of its divisors is an integer number (140364196121058).

Almost surely, 2^{561437808627131} is an apocalyptic number.

561437808627131 is a deficient number, since it is larger than the sum of its proper divisors (18975857101).

561437808627131 is a wasteful number, since it uses less digits than its factorization.

561437808627131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18975857100.

The product of its (nonzero) digits is 40642560, while the sum is 62.

The spelling of 561437808627131 in words is "five hundred sixty-one trillion, four hundred thirty-seven billion, eight hundred eight million, six hundred twenty-seven thousand, one hundred thirty-one".