11533253172 has 24 divisors (see below), whose sum is σ = 30755342016. Its totient is φ = 3295215168.

The previous prime is 11533253141. The next prime is 11533253177. The reversal of 11533253172 is 27135233511.

It is a super-3 number, since 3×11533253172³ (a number of 31 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11533253177) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 68650233 + ... + 68650400.

It is an arithmetic number, because the mean of its divisors is an integer number (1281472584).

Almost surely, 2^11533253172 is an apocalyptic number.

11533253172 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

11533253172 is an abundant number, since it is smaller than the sum of its proper divisors (19222088844).

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

11533253172 is a wasteful number, since it uses less digits than its factorization.

11533253172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137300647 (or 137300645 counting only the distinct ones).

The product of its digits is 18900, while the sum is 33.

Adding to 11533253172 its reverse (27135233511), we get a palindrome (38668486683).

The spelling of 11533253172 in words is "eleven billion, five hundred thirty-three million, two hundred fifty-three thousand, one hundred seventy-two".