11513128755431 has 8 divisors (see below), whose sum is σ = 11571146428800. Its totient is φ = 11455112710008.

The previous prime is 11513128755397. The next prime is 11513128755461. The reversal of 11513128755431 is 13455782131511.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11513128755431 is a prime.

It is a super-2 number, since 2×11513128755431² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11513128755461) 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, 15295160 + ... + 16030226.

It is an arithmetic number, because the mean of its divisors is an integer number (1446393303600).

Almost surely, 2^{11513128755431} is an apocalyptic number.

11513128755431 is a deficient number, since it is larger than the sum of its proper divisors (58017673369).

11513128755431 is an equidigital number, since it uses as much as digits as its factorization.

11513128755431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 813973.

The product of its digits is 504000, while the sum is 47.

The spelling of 11513128755431 in words is "eleven trillion, five hundred thirteen billion, one hundred twenty-eight million, seven hundred fifty-five thousand, four hundred thirty-one".