15767728676387 has 2 divisors, whose sum is σ = 15767728676388. Its totient is φ = 15767728676386.

The previous prime is 15767728676321. The next prime is 15767728676389. The reversal of 15767728676387 is 78367682776751.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 15767728676387 - 2²⁰ = 15767727627811 is a prime.

It is a super-2 number, since 2×15767728676387² (a number of 27 digits) contains 22 as substring.

Together with 15767728676389, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (15767728676389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7883864338193 + 7883864338194.

It is an arithmetic number, because the mean of its divisors is an integer number (7883864338194).

Almost surely, 2^{15767728676387} is an apocalyptic number.

15767728676387 is a deficient number, since it is larger than the sum of its proper divisors (1).

15767728676387 is an equidigital number, since it uses as much as digits as its factorization.

15767728676387 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6970199040, while the sum is 80.

The spelling of 15767728676387 in words is "fifteen trillion, seven hundred sixty-seven billion, seven hundred twenty-eight million, six hundred seventy-six thousand, three hundred eighty-seven".