15971271156 has 36 divisors (see below), whose sum is σ = 40574716000. Its totient is φ = 5297002128.

The previous prime is 15971271143. The next prime is 15971271157. The reversal of 15971271156 is 65117217951.

15971271156 is a `hidden beast` number, since 1 + 597 + 1 + 2 + 7 + 1 + 1 + 56 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15971271157) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1107526 + ... + 1121853.

Almost surely, 2^15971271156 is an apocalyptic number.

It is an amenable number.

15971271156 is an abundant number, since it is smaller than the sum of its proper divisors (24603444844).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

15971271156 is a wasteful number, since it uses less digits than its factorization.

15971271156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2229588 (or 2229583 counting only the distinct ones).

The product of its digits is 132300, while the sum is 45.

The spelling of 15971271156 in words is "fifteen billion, nine hundred seventy-one million, two hundred seventy-one thousand, one hundred fifty-six".