11712235819 has 4 divisors (see below), whose sum is σ = 11712660696. Its totient is φ = 11711810944.

The previous prime is 11712235817. The next prime is 11712235841. The reversal of 11712235819 is 91853221711.

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 11712235819 - 2¹ = 11712235817 is a prime.

It is a super-2 number, since 2×11712235819² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11712235817) 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, 167989 + ... + 227254.

It is an arithmetic number, because the mean of its divisors is an integer number (2928165174).

Almost surely, 2^11712235819 is an apocalyptic number.

11712235819 is a deficient number, since it is larger than the sum of its proper divisors (424877).

11712235819 is an equidigital number, since it uses as much as digits as its factorization.

11712235819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 424876.

The product of its digits is 30240, while the sum is 40.

The spelling of 11712235819 in words is "eleven billion, seven hundred twelve million, two hundred thirty-five thousand, eight hundred nineteen".