11456403431 has 32 divisors (see below), whose sum is σ = 13624934400. Its totient is φ = 9524037600.

The previous prime is 11456403421. The next prime is 11456403433. The reversal of 11456403431 is 13430465411.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-11456403431 is a prime.

It is a super-2 number, since 2×11456403431² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11456403433) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 642170 + ... + 659768.

It is an arithmetic number, because the mean of its divisors is an integer number (425779200).

Almost surely, 2^11456403431 is an apocalyptic number.

11456403431 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

11456403431 is a deficient number, since it is larger than the sum of its proper divisors (2168530969).

11456403431 is a wasteful number, since it uses less digits than its factorization.

11456403431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17747.

The product of its (nonzero) digits is 17280, while the sum is 32.

Adding to 11456403431 its reverse (13430465411), we get a palindrome (24886868842).

The spelling of 11456403431 in words is "eleven billion, four hundred fifty-six million, four hundred three thousand, four hundred thirty-one".