11311277172 has 48 divisors (see below), whose sum is σ = 28959517440. Its totient is φ = 3414722688.

The previous prime is 11311277171. The next prime is 11311277177. The reversal of 11311277172 is 27177211311.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11311277171) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 675772 + ... + 692307.

It is an arithmetic number, because the mean of its divisors is an integer number (603323280).

Almost surely, 2^11311277172 is an apocalyptic number.

11311277172 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

11311277172 is an abundant number, since it is smaller than the sum of its proper divisors (17648240268).

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

11311277172 is a wasteful number, since it uses less digits than its factorization.

11311277172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1368152 (or 1368150 counting only the distinct ones).

The product of its digits is 4116, while the sum is 33.

Adding to 11311277172 its reverse (27177211311), we get a palindrome (38488488483).

The spelling of 11311277172 in words is "eleven billion, three hundred eleven million, two hundred seventy-seven thousand, one hundred seventy-two".