1155167172 has 36 divisors (see below), whose sum is σ = 2923962496. Its totient is φ = 384534000.

The previous prime is 1155167137. The next prime is 1155167197. The reversal of 1155167172 is 2717615511.

It is a happy number.

1155167172 is a `hidden beast` number, since 1 + 1 + 5 + 516 + 71 + 72 = 666.

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

It is a super-2 number, since 2×1155167172² = 2668822390532955168, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5673 + ... + 48399.

Almost surely, 2^1155167172 is an apocalyptic number.

1155167172 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1155167172 is an abundant number, since it is smaller than the sum of its proper divisors (1768795324).

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

1155167172 is a wasteful number, since it uses less digits than its factorization.

1155167172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43488 (or 43483 counting only the distinct ones).

The product of its digits is 14700, while the sum is 36.

The square root of 1155167172 is about 33987.7503227266. The cubic root of 1155167172 is about 1049.2563659827.

The spelling of 1155167172 in words is "one billion, one hundred fifty-five million, one hundred sixty-seven thousand, one hundred seventy-two".