561274326505 has 16 divisors (see below), whose sum is σ = 678473208000. Its totient is φ = 445724389440.

The previous prime is 561274326499. The next prime is 561274326517. The reversal of 561274326505 is 505623472165.

It is a happy number.

561274326505 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 561274326505 - 2³ = 561274326497 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5052610 + ... + 5162500.

It is an arithmetic number, because the mean of its divisors is an integer number (42404575500).

Almost surely, 2^561274326505 is an apocalyptic number.

It is an amenable number.

561274326505 is a deficient number, since it is larger than the sum of its proper divisors (117198881495).

561274326505 is a wasteful number, since it uses less digits than its factorization.

561274326505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117384.

The product of its (nonzero) digits is 1512000, while the sum is 46.

The spelling of 561274326505 in words is "five hundred sixty-one billion, two hundred seventy-four million, three hundred twenty-six thousand, five hundred five".