11638145479 has 4 divisors (see below), whose sum is σ = 11723095584. Its totient is φ = 11553195376.

The previous prime is 11638145417. The next prime is 11638145483. The reversal of 11638145479 is 97454183611.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 11638145479 - 2²⁷ = 11503927751 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11638145879) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42474847 + ... + 42475120.

It is an arithmetic number, because the mean of its divisors is an integer number (2930773896).

Almost surely, 2^11638145479 is an apocalyptic number.

11638145479 is a deficient number, since it is larger than the sum of its proper divisors (84950105).

11638145479 is an equidigital number, since it uses as much as digits as its factorization.

11638145479 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84950104.

The product of its digits is 725760, while the sum is 49.

The spelling of 11638145479 in words is "eleven billion, six hundred thirty-eight million, one hundred forty-five thousand, four hundred seventy-nine".