61177930663 has 2 divisors, whose sum is σ = 61177930664. Its totient is φ = 61177930662.

The previous prime is 61177930643. The next prime is 61177930679. The reversal of 61177930663 is 36603977116.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61177930663 - 2²⁵ = 61144376231 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61177930633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30588965331 + 30588965332.

It is an arithmetic number, because the mean of its divisors is an integer number (30588965332).

Almost surely, 2^61177930663 is an apocalyptic number.

61177930663 is a deficient number, since it is larger than the sum of its proper divisors (1).

61177930663 is an equidigital number, since it uses as much as digits as its factorization.

61177930663 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 857304, while the sum is 49.

The spelling of 61177930663 in words is "sixty-one billion, one hundred seventy-seven million, nine hundred thirty thousand, six hundred sixty-three".