561320402727 has 12 divisors (see below), whose sum is σ = 870619400376. Its totient is φ = 320754515760.

The previous prime is 561320402693. The next prime is 561320402737. The reversal of 561320402727 is 727204023165.

561320402727 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 561320402727 - 2¹² = 561320398631 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561320402737) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1909252924 + ... + 1909253217.

It is an arithmetic number, because the mean of its divisors is an integer number (72551616698).

Almost surely, 2^561320402727 is an apocalyptic number.

561320402727 is a deficient number, since it is larger than the sum of its proper divisors (309298997649).

561320402727 is a wasteful number, since it uses less digits than its factorization.

561320402727 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3818506158 (or 3818506151 counting only the distinct ones).

The product of its (nonzero) digits is 141120, while the sum is 39.

The spelling of 561320402727 in words is "five hundred sixty-one billion, three hundred twenty million, four hundred two thousand, seven hundred twenty-seven".