15916280091081 has 8 divisors (see below), whose sum is σ = 21739309392864. Its totient is φ = 10352052091680.

The previous prime is 15916280091077. The next prime is 15916280091083. The reversal of 15916280091081 is 18019008261951.

15916280091081 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 15916280091081 - 2² = 15916280091077 is a prime.

It is a super-2 number, since 2×15916280091081² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (15916280091083) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64700325451 + ... + 64700325696.

It is an arithmetic number, because the mean of its divisors is an integer number (2717413674108).

Almost surely, 2^{15916280091081} is an apocalyptic number.

It is an amenable number.

15916280091081 is a deficient number, since it is larger than the sum of its proper divisors (5823029301783).

15916280091081 is a wasteful number, since it uses less digits than its factorization.

15916280091081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129400651191.

The product of its (nonzero) digits is 311040, while the sum is 51.

The spelling of 15916280091081 in words is "fifteen trillion, nine hundred sixteen billion, two hundred eighty million, ninety-one thousand, eighty-one".