9156749971 has 18 divisors (see below), whose sum is σ = 9995717940. Its totient is φ = 8364619872.

The previous prime is 9156749969. The next prime is 9156749983. The reversal of 9156749971 is 1799476519.

It is not a de Polignac number, because 9156749971 - 2¹ = 9156749969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9156749071) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 12095725 + ... + 12096481.

Almost surely, 2^9156749971 is an apocalyptic number.

9156749971 is a deficient number, since it is larger than the sum of its proper divisors (838967969).

9156749971 is an frugal number, since it uses more digits than its factorization.

9156749971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1591 (or 805 counting only the distinct ones).

The product of its digits is 4286520, while the sum is 58.

The square root of 9156749971 is about 95690.9085075484. The cubic root of 9156749971 is about 2092.0904254882.

The spelling of 9156749971 in words is "nine billion, one hundred fifty-six million, seven hundred forty-nine thousand, nine hundred seventy-one".