561256752005 has 4 divisors (see below), whose sum is σ = 673508102412. Its totient is φ = 449005401600.

The previous prime is 561256751989. The next prime is 561256752053. The reversal of 561256752005 is 500257652165.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 120085813156 + 441170938849 = 346534^2 + 664207^2 .

It is not a de Polignac number, because 561256752005 - 2⁴ = 561256751989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56125675196 + ... + 56125675205.

It is an arithmetic number, because the mean of its divisors is an integer number (168377025603).

Almost surely, 2^561256752005 is an apocalyptic number.

It is an amenable number.

561256752005 is a deficient number, since it is larger than the sum of its proper divisors (112251350407).

561256752005 is a wasteful number, since it uses less digits than its factorization.

561256752005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112251350406.

The product of its (nonzero) digits is 630000, while the sum is 44.

The spelling of 561256752005 in words is "five hundred sixty-one billion, two hundred fifty-six million, seven hundred fifty-two thousand, five".