11564426431 has 2 divisors, whose sum is σ = 11564426432. Its totient is φ = 11564426430.

The previous prime is 11564426429. The next prime is 11564426453. The reversal of 11564426431 is 13462446511.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11564426431 - 2¹ = 11564426429 is a prime.

It is a super-3 number, since 3×11564426431³ (a number of 31 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

Together with 11564426429, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11561426431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5782213215 + 5782213216.

It is an arithmetic number, because the mean of its divisors is an integer number (5782213216).

Almost surely, 2^11564426431 is an apocalyptic number.

11564426431 is a deficient number, since it is larger than the sum of its proper divisors (1).

11564426431 is an equidigital number, since it uses as much as digits as its factorization.

11564426431 is an evil number, because the sum of its binary digits is even.

The product of its digits is 69120, while the sum is 37.

The spelling of 11564426431 in words is "eleven billion, five hundred sixty-four million, four hundred twenty-six thousand, four hundred thirty-one".