561264749013 has 4 divisors (see below), whose sum is σ = 748352998688. Its totient is φ = 374176499340.

The previous prime is 561264748931. The next prime is 561264749053. The reversal of 561264749013 is 310947462165.

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 not a de Polignac number, because 561264749013 - 2⁸ = 561264748757 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561264749053) 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, 93544124833 + ... + 93544124838.

It is an arithmetic number, because the mean of its divisors is an integer number (187088249672).

Almost surely, 2^561264749013 is an apocalyptic number.

It is an amenable number.

561264749013 is a deficient number, since it is larger than the sum of its proper divisors (187088249675).

561264749013 is a wasteful number, since it uses less digits than its factorization.

561264749013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187088249674.

The product of its (nonzero) digits is 1088640, while the sum is 48.

The spelling of 561264749013 in words is "five hundred sixty-one billion, two hundred sixty-four million, seven hundred forty-nine thousand, thirteen".