11172871953 has 12 divisors (see below), whose sum is σ = 16140400848. Its totient is φ = 7447746840.

The previous prime is 11172871939. The next prime is 11172871991. The reversal of 11172871953 is 35917827111.

It is not a de Polignac number, because 11172871953 - 2⁵ = 11172871921 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 11172871899 and 11172871908.

It is not an unprimeable number, because it can be changed into a prime (11172871453) 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, 21538 + ... + 151028.

It is an arithmetic number, because the mean of its divisors is an integer number (1345033404).

Almost surely, 2^11172871953 is an apocalyptic number.

It is an amenable number.

11172871953 is a deficient number, since it is larger than the sum of its proper divisors (4967528895).

11172871953 is a wasteful number, since it uses less digits than its factorization.

11172871953 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139084 (or 139081 counting only the distinct ones).

The product of its digits is 105840, while the sum is 45.

The spelling of 11172871953 in words is "eleven billion, one hundred seventy-two million, eight hundred seventy-one thousand, nine hundred fifty-three".