561163507 has 2 divisors, whose sum is σ = 561163508. Its totient is φ = 561163506.

The previous prime is 561163441. The next prime is 561163511. The reversal of 561163507 is 705361165.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 561163507 - 2²³ = 552774899 is a prime.

It is not a weakly prime, because it can be changed into another prime (561163007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 280581753 + 280581754.

It is an arithmetic number, because the mean of its divisors is an integer number (280581754).

Almost surely, 2^561163507 is an apocalyptic number.

561163507 is a deficient number, since it is larger than the sum of its proper divisors (1).

561163507 is an equidigital number, since it uses as much as digits as its factorization.

561163507 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18900, while the sum is 34.

The square root of 561163507 is about 23688.8899486658. The cubic root of 561163507 is about 824.8275155784.

The spelling of 561163507 in words is "five hundred sixty-one million, one hundred sixty-three thousand, five hundred seven".