15977680487 has 2 divisors, whose sum is σ = 15977680488. Its totient is φ = 15977680486.

The previous prime is 15977680451. The next prime is 15977680517. The reversal of 15977680487 is 78408677951.

15977680487 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 15977680487 - 2²² = 15973486183 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15977680417) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7988840243 + 7988840244.

It is an arithmetic number, because the mean of its divisors is an integer number (7988840244).

Almost surely, 2^15977680487 is an apocalyptic number.

15977680487 is a deficient number, since it is larger than the sum of its proper divisors (1).

15977680487 is an equidigital number, since it uses as much as digits as its factorization.

15977680487 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23708160, while the sum is 62.

The spelling of 15977680487 in words is "fifteen billion, nine hundred seventy-seven million, six hundred eighty thousand, four hundred eighty-seven".