11731814399 has 8 divisors (see below), whose sum is σ = 12011221200. Its totient is φ = 11458903848.

The previous prime is 11731814387. The next prime is 11731814411. The reversal of 11731814399 is 99341813711.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (11731814387) and next prime (11731814411).

It is not a de Polignac number, because 11731814399 - 2¹⁶ = 11731748863 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 (11761814399) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5729 + ... + 153285.

It is an arithmetic number, because the mean of its divisors is an integer number (1501402650).

Almost surely, 2^11731814399 is an apocalyptic number.

11731814399 is a deficient number, since it is larger than the sum of its proper divisors (279406801).

11731814399 is an frugal number, since it uses more digits than its factorization.

11731814399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147686 (or 147600 counting only the distinct ones).

The product of its digits is 163296, while the sum is 47.

The spelling of 11731814399 in words is "eleven billion, seven hundred thirty-one million, eight hundred fourteen thousand, three hundred ninety-nine".