11571110172 has 60 divisors (see below), whose sum is σ = 30264224760. Its totient is φ = 3855117024.

The previous prime is 11571110167. The next prime is 11571110237. The reversal of 11571110172 is 27101117511.

It is a happy number.

11571110172 is a `hidden beast` number, since 11 + 571 + 1 + 10 + 1 + 72 = 666.

It is a super-2 number, since 2×11571110172² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 740383 + ... + 755849.

It is an arithmetic number, because the mean of its divisors is an integer number (504403746).

Almost surely, 2^11571110172 is an apocalyptic number.

11571110172 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

11571110172 is an abundant number, since it is smaller than the sum of its proper divisors (18693114588).

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

11571110172 is a wasteful number, since it uses less digits than its factorization.

11571110172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17792 (or 17781 counting only the distinct ones).

The product of its (nonzero) digits is 490, while the sum is 27.

Adding to 11571110172 its reverse (27101117511), we get a palindrome (38672227683).

The spelling of 11571110172 in words is "eleven billion, five hundred seventy-one million, one hundred ten thousand, one hundred seventy-two".