561615752461 has 16 divisors (see below), whose sum is σ = 596350771200. Its totient is φ = 527070178048.

The previous prime is 561615752459. The next prime is 561615752473. The reversal of 561615752461 is 164257516165.

It is a cyclic number.

It is not a de Polignac number, because 561615752461 - 2¹ = 561615752459 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 (561615752431) 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, 35926395 + ... + 35942023.

It is an arithmetic number, because the mean of its divisors is an integer number (37271923200).

Almost surely, 2^561615752461 is an apocalyptic number.

It is an amenable number.

561615752461 is a deficient number, since it is larger than the sum of its proper divisors (34735018739).

561615752461 is a wasteful number, since it uses less digits than its factorization.

561615752461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21548.

The product of its digits is 1512000, while the sum is 49.

The spelling of 561615752461 in words is "five hundred sixty-one billion, six hundred fifteen million, seven hundred fifty-two thousand, four hundred sixty-one".