11523937949 has 4 divisors (see below), whose sum is σ = 11541860736. Its totient is φ = 11506015164.

The previous prime is 11523937933. The next prime is 11523937981. The reversal of 11523937949 is 94973932511.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 11523937949 - 2⁴ = 11523937933 is a prime.

It is a super-2 number, since 2×11523937949² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11523937949.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11523930949) 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 in 3 ways as a sum of consecutive naturals, for example, 8960429 + ... + 8961714.

It is an arithmetic number, because the mean of its divisors is an integer number (2885465184).

Almost surely, 2^11523937949 is an apocalyptic number.

It is an amenable number.

11523937949 is a deficient number, since it is larger than the sum of its proper divisors (17922787).

11523937949 is an equidigital number, since it uses as much as digits as its factorization.

11523937949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17922786.

The product of its digits is 1837080, while the sum is 53.

The spelling of 11523937949 in words is "eleven billion, five hundred twenty-three million, nine hundred thirty-seven thousand, nine hundred forty-nine".