11195315172 has 36 divisors (see below), whose sum is σ = 28302843660. Its totient is φ = 3731300352.

The previous prime is 11195315171. The next prime is 11195315189. The reversal of 11195315172 is 27151359111.

11195315172 is a `hidden beast` number, since 1 + 1 + 1 + 9 + 531 + 51 + 72 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 6615544896 + 4579770276 = 81336^2 + 67674^2 .

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

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

It is not an unprimeable number, because it can be changed into a prime (11195315171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 381604 + ... + 409892.

Almost surely, 2^11195315172 is an apocalyptic number.

11195315172 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

11195315172 is an abundant number, since it is smaller than the sum of its proper divisors (17107528488).

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

11195315172 is a wasteful number, since it uses less digits than its factorization.

11195315172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39292 (or 39287 counting only the distinct ones).

The product of its digits is 9450, while the sum is 36.

The spelling of 11195315172 in words is "eleven billion, one hundred ninety-five million, three hundred fifteen thousand, one hundred seventy-two".