15990801171 has 32 divisors (see below), whose sum is σ = 23120621568. Its totient is φ = 9791470080.

The previous prime is 15990801161. The next prime is 15990801199. The reversal of 15990801171 is 17110809951.

It is not a de Polignac number, because 15990801171 - 2⁶ = 15990801107 is a prime.

It is not an unprimeable number, because it can be changed into a prime (15990801131) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3223425 + ... + 3228381.

It is an arithmetic number, because the mean of its divisors is an integer number (722519424).

Almost surely, 2^15990801171 is an apocalyptic number.

15990801171 is a deficient number, since it is larger than the sum of its proper divisors (7129820397).

15990801171 is a wasteful number, since it uses less digits than its factorization.

15990801171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6491.

The product of its (nonzero) digits is 22680, while the sum is 42.

The spelling of 15990801171 in words is "fifteen billion, nine hundred ninety million, eight hundred one thousand, one hundred seventy-one".