561163627 has 2 divisors, whose sum is σ = 561163628. Its totient is φ = 561163626.

The previous prime is 561163607. The next prime is 561163633. The reversal of 561163627 is 726361165.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-561163627 is a prime.

It is not a weakly prime, because it can be changed into another prime (561163607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 280581813 + 280581814.

It is an arithmetic number, because the mean of its divisors is an integer number (280581814).

Almost surely, 2^561163627 is an apocalyptic number.

561163627 is a deficient number, since it is larger than the sum of its proper divisors (1).

561163627 is an equidigital number, since it uses as much as digits as its factorization.

561163627 is an evil number, because the sum of its binary digits is even.

The product of its digits is 45360, while the sum is 37.

The square root of 561163627 is about 23688.8924814986. The cubic root of 561163627 is about 824.8275743725.

The spelling of 561163627 in words is "five hundred sixty-one million, one hundred sixty-three thousand, six hundred twenty-seven".