15916980555511 has 8 divisors (see below), whose sum is σ = 18266315565344. Its totient is φ = 13586515706880.

The previous prime is 15916980555493. The next prime is 15916980555529. The reversal of 15916980555511 is 11555508961951.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (15916980555493) and next prime (15916980555529).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 15916980555511 - 2²³ = 15916972166903 is a prime.

It is a super-2 number, since 2×15916980555511² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 15916980555511.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15916980555551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4717538490 + ... + 4717541863.

It is an arithmetic number, because the mean of its divisors is an integer number (2283289445668).

Almost surely, 2^{15916980555511} is an apocalyptic number.

15916980555511 is a deficient number, since it is larger than the sum of its proper divisors (2349335009833).

15916980555511 is an equidigital number, since it uses as much as digits as its factorization.

15916980555511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9435080601.

The product of its (nonzero) digits is 12150000, while the sum is 61.

The spelling of 15916980555511 in words is "fifteen trillion, nine hundred sixteen billion, nine hundred eighty million, five hundred fifty-five thousand, five hundred eleven".