15761871615887 has 2 divisors, whose sum is σ = 15761871615888. Its totient is φ = 15761871615886.

The previous prime is 15761871615827. The next prime is 15761871615899. The reversal of 15761871615887 is 78851617816751.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 15761871615887 - 2²⁴ = 15761854838671 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 15761871615887.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15761871615827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7880935807943 + 7880935807944.

It is an arithmetic number, because the mean of its divisors is an integer number (7880935807944).

Almost surely, 2^{15761871615887} is an apocalyptic number.

15761871615887 is a deficient number, since it is larger than the sum of its proper divisors (1).

15761871615887 is an equidigital number, since it uses as much as digits as its factorization.

15761871615887 is an evil number, because the sum of its binary digits is even.

The product of its digits is 158054400, while the sum is 71.

The spelling of 15761871615887 in words is "fifteen trillion, seven hundred sixty-one billion, eight hundred seventy-one million, six hundred fifteen thousand, eight hundred eighty-seven".