561496771320 has 64 divisors (see below), whose sum is σ = 1688007168000. Its totient is φ = 149419863168.

The previous prime is 561496771301. The next prime is 561496771327. The reversal of 561496771320 is 23177694165.

561496771320 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561496771327) 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, 4826800 + ... + 4941759.

It is an arithmetic number, because the mean of its divisors is an integer number (26375112000).

Almost surely, 2^561496771320 is an apocalyptic number.

It is an amenable number.

561496771320 is an abundant number, since it is smaller than the sum of its proper divisors (1126510396680).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

561496771320 is a wasteful number, since it uses less digits than its factorization.

561496771320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9769052 (or 9769048 counting only the distinct ones).

The product of its (nonzero) digits is 1905120, while the sum is 51.

The spelling of 561496771320 in words is "five hundred sixty-one billion, four hundred ninety-six million, seven hundred seventy-one thousand, three hundred twenty".