11831971459 has 16 divisors (see below), whose sum is σ = 14929286400. Its totient is φ = 9108632160.

The previous prime is 11831971447. The next prime is 11831971499. The reversal of 11831971459 is 95417913811.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 11831971459 - 2²¹ = 11829874307 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11831971499) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 919284 + ... + 932065.

It is an arithmetic number, because the mean of its divisors is an integer number (933080400).

Almost surely, 2^11831971459 is an apocalyptic number.

11831971459 is a deficient number, since it is larger than the sum of its proper divisors (3097314941).

11831971459 is a wasteful number, since it uses less digits than its factorization.

11831971459 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1851450.

The product of its digits is 272160, while the sum is 49.

The spelling of 11831971459 in words is "eleven billion, eight hundred thirty-one million, nine hundred seventy-one thousand, four hundred fifty-nine".