7149779172 has 48 divisors (see below), whose sum is σ = 19342404480. Its totient is φ = 2279638944.

The previous prime is 7149779159. The next prime is 7149779191. The reversal of 7149779172 is 2719779417.

7149779172 is a `hidden beast` number, since 71 + 497 + 79 + 17 + 2 = 666.

It is a super-2 number, since 2×7149779172² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1436683 + ... + 1441650.

It is an arithmetic number, because the mean of its divisors is an integer number (402966760).

Almost surely, 2^7149779172 is an apocalyptic number.

It is an amenable number.

7149779172 is an abundant number, since it is smaller than the sum of its proper divisors (12192625308).

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

7149779172 is a wasteful number, since it uses less digits than its factorization.

7149779172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2878369 (or 2878361 counting only the distinct ones).

The product of its digits is 1555848, while the sum is 54.

The square root of 7149779172 is about 84556.3668330186. The cubic root of 7149779172 is about 1926.4786904218.

The spelling of 7149779172 in words is "seven billion, one hundred forty-nine million, seven hundred seventy-nine thousand, one hundred seventy-two".