15977671417 has 2 divisors, whose sum is σ = 15977671418. Its totient is φ = 15977671416.

The previous prime is 15977671399. The next prime is 15977671429. The reversal of 15977671417 is 71417677951.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15730427241 + 247244176 = 125421^2 + 15724^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15977671417 is a prime.

It is not a weakly prime, because it can be changed into another prime (15977671477) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7988835708 + 7988835709.

It is an arithmetic number, because the mean of its divisors is an integer number (7988835709).

Almost surely, 2^15977671417 is an apocalyptic number.

It is an amenable number.

15977671417 is a deficient number, since it is larger than the sum of its proper divisors (1).

15977671417 is an equidigital number, since it uses as much as digits as its factorization.

15977671417 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2593080, while the sum is 55.

The spelling of 15977671417 in words is "fifteen billion, nine hundred seventy-seven million, six hundred seventy-one thousand, four hundred seventeen".