11513021623 has 2 divisors, whose sum is σ = 11513021624. Its totient is φ = 11513021622.

The previous prime is 11513021603. The next prime is 11513021647. The reversal of 11513021623 is 32612031511.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (32612031511) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11513021623 - 2³³ = 2923087031 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11513021603) by changing a digit.

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 as a sum of consecutive naturals, namely, 5756510811 + 5756510812.

It is an arithmetic number, because the mean of its divisors is an integer number (5756510812).

Almost surely, 2^11513021623 is an apocalyptic number.

11513021623 is a deficient number, since it is larger than the sum of its proper divisors (1).

11513021623 is an equidigital number, since it uses as much as digits as its factorization.

11513021623 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1080, while the sum is 25.

The spelling of 11513021623 in words is "eleven billion, five hundred thirteen million, twenty-one thousand, six hundred twenty-three".