561494602531 has 2 divisors, whose sum is σ = 561494602532. Its totient is φ = 561494602530.

The previous prime is 561494602517. The next prime is 561494602541. The reversal of 561494602531 is 135206494165.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-561494602531 is a prime.

It is a super-2 number, since 2×561494602531² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (561494602511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 280747301265 + 280747301266.

It is an arithmetic number, because the mean of its divisors is an integer number (280747301266).

Almost surely, 2^561494602531 is an apocalyptic number.

561494602531 is a deficient number, since it is larger than the sum of its proper divisors (1).

561494602531 is an equidigital number, since it uses as much as digits as its factorization.

561494602531 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 777600, while the sum is 46.

The spelling of 561494602531 in words is "five hundred sixty-one billion, four hundred ninety-four million, six hundred two thousand, five hundred thirty-one".