15916968811087 has 4 divisors (see below), whose sum is σ = 15919077864456. Its totient is φ = 15914859757720.

The previous prime is 15916968811013. The next prime is 15916968811097. The reversal of 15916968811087 is 78011886961951.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 15916968811087 - 2¹¹ = 15916968809039 is a prime.

It is a super-2 number, since 2×15916968811087² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15916968811097) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1054515364 + ... + 1054530457.

It is an arithmetic number, because the mean of its divisors is an integer number (3979769466114).

Almost surely, 2^{15916968811087} is an apocalyptic number.

15916968811087 is a deficient number, since it is larger than the sum of its proper divisors (2109053369).

15916968811087 is an equidigital number, since it uses as much as digits as its factorization.

15916968811087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2109053368.

The product of its (nonzero) digits is 52254720, while the sum is 70.

The spelling of 15916968811087 in words is "fifteen trillion, nine hundred sixteen billion, nine hundred sixty-eight million, eight hundred eleven thousand, eighty-seven".