11513351256 has 64 divisors (see below), whose sum is σ = 31481049600. Its totient is φ = 3479894400.

The previous prime is 11513351231. The next prime is 11513351281. The reversal of 11513351256 is 65215331511.

It is an interprime number because it is at equal distance from previous prime (11513351231) and next prime (11513351281).

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 46641 + ... + 158751.

It is an arithmetic number, because the mean of its divisors is an integer number (491891400).

Almost surely, 2^11513351256 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11513351256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15740524800).

11513351256 is an abundant number, since it is smaller than the sum of its proper divisors (19967698344).

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

11513351256 is a wasteful number, since it uses less digits than its factorization.

11513351256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112520 (or 112516 counting only the distinct ones).

The product of its digits is 13500, while the sum is 33.

Adding to 11513351256 its reverse (65215331511), we get a palindrome (76728682767).

The spelling of 11513351256 in words is "eleven billion, five hundred thirteen million, three hundred fifty-one thousand, two hundred fifty-six".