15960077677 has 2 divisors, whose sum is σ = 15960077678. Its totient is φ = 15960077676.

The previous prime is 15960077659. The next prime is 15960077701. The reversal of 15960077677 is 77677006951.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13314621321 + 2645456356 = 115389^2 + 51434^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15960077677 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15960077647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7980038838 + 7980038839.

It is an arithmetic number, because the mean of its divisors is an integer number (7980038839).

Almost surely, 2^15960077677 is an apocalyptic number.

It is an amenable number.

15960077677 is a deficient number, since it is larger than the sum of its proper divisors (1).

15960077677 is an equidigital number, since it uses as much as digits as its factorization.

15960077677 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3889620, while the sum is 55.

The spelling of 15960077677 in words is "fifteen billion, nine hundred sixty million, seventy-seven thousand, six hundred seventy-seven".