561431570377 has 4 divisors (see below), whose sum is σ = 563236816896. Its totient is φ = 559626323860.

The previous prime is 561431570351. The next prime is 561431570387. The reversal of 561431570377 is 773075134165.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 561431570377 - 2¹⁵ = 561431537609 is a prime.

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 561431570377.

It is not an unprimeable number, because it can be changed into a prime (561431570387) 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, 902622793 + ... + 902623414.

It is an arithmetic number, because the mean of its divisors is an integer number (140809204224).

Almost surely, 2^561431570377 is an apocalyptic number.

It is an amenable number.

561431570377 is a deficient number, since it is larger than the sum of its proper divisors (1805246519).

561431570377 is a wasteful number, since it uses less digits than its factorization.

561431570377 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1805246518.

The product of its (nonzero) digits is 1852200, while the sum is 49.

The spelling of 561431570377 in words is "five hundred sixty-one billion, four hundred thirty-one million, five hundred seventy thousand, three hundred seventy-seven".