61156664167 has 2 divisors, whose sum is σ = 61156664168. Its totient is φ = 61156664166.

The previous prime is 61156664159. The next prime is 61156664203. The reversal of 61156664167 is 76146665116.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 61156664167 - 2³ = 61156664159 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 61156664167.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61156664267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30578332083 + 30578332084.

It is an arithmetic number, because the mean of its divisors is an integer number (30578332084).

Almost surely, 2^61156664167 is an apocalyptic number.

61156664167 is a deficient number, since it is larger than the sum of its proper divisors (1).

61156664167 is an equidigital number, since it uses as much as digits as its factorization.

61156664167 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1088640, while the sum is 49.

The spelling of 61156664167 in words is "sixty-one billion, one hundred fifty-six million, six hundred sixty-four thousand, one hundred sixty-seven".