61056556163 has 2 divisors, whose sum is σ = 61056556164. Its totient is φ = 61056556162.

The previous prime is 61056556153. The next prime is 61056556189. The reversal of 61056556163 is 36165565016.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 61056556163 - 2²² = 61052361859 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (61056556153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30528278081 + 30528278082.

It is an arithmetic number, because the mean of its divisors is an integer number (30528278082).

Almost surely, 2^61056556163 is an apocalyptic number.

61056556163 is a deficient number, since it is larger than the sum of its proper divisors (1).

61056556163 is an equidigital number, since it uses as much as digits as its factorization.

61056556163 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 486000, while the sum is 44.

The spelling of 61056556163 in words is "sixty-one billion, fifty-six million, five hundred fifty-six thousand, one hundred sixty-three".