11723531915 has 4 divisors (see below), whose sum is σ = 14068238304. Its totient is φ = 9378825528.

The previous prime is 11723531899. The next prime is 11723531947. The reversal of 11723531915 is 51913532711.

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 11723531915 - 2⁴ = 11723531899 is a prime.

It is a super-3 number, since 3×11723531915³ (a number of 31 digits) contains 333 as substring.

It is a Duffinian number.

It is an unprimeable number.

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, 1172353187 + ... + 1172353196.

It is an arithmetic number, because the mean of its divisors is an integer number (3517059576).

Almost surely, 2^11723531915 is an apocalyptic number.

11723531915 is a deficient number, since it is larger than the sum of its proper divisors (2344706389).

11723531915 is an equidigital number, since it uses as much as digits as its factorization.

11723531915 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2344706388.

The product of its digits is 28350, while the sum is 38.

The spelling of 11723531915 in words is "eleven billion, seven hundred twenty-three million, five hundred thirty-one thousand, nine hundred fifteen".