9809118772 has 12 divisors (see below), whose sum is σ = 17168673760. Its totient is φ = 4903783416.

The previous prime is 9809118769. The next prime is 9809118773. The reversal of 9809118772 is 2778119089.

It is a super-2 number, since 2×9809118772² (a number of 21 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (52) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9809118773) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 165072 + ... + 216487.

Almost surely, 2^9809118772 is an apocalyptic number.

It is an amenable number.

9809118772 is a deficient number, since it is larger than the sum of its proper divisors (7359554988).

9809118772 is a wasteful number, since it uses less digits than its factorization.

9809118772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 387990 (or 387988 counting only the distinct ones).

The product of its (nonzero) digits is 508032, while the sum is 52.

The square root of 9809118772 is about 99040.9954109913. The cubic root of 9809118772 is about 2140.6384949531.

The spelling of 9809118772 in words is "nine billion, eight hundred nine million, one hundred eighteen thousand, seven hundred seventy-two".