11909919879 has 48 divisors (see below), whose sum is σ = 20224617504. Its totient is φ = 6658329600.

The previous prime is 11909919871. The next prime is 11909919907. The reversal of 11909919879 is 97891990911.

It is not a de Polignac number, because 11909919879 - 2³ = 11909919871 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11909919871) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2933619 + ... + 2937675.

It is an arithmetic number, because the mean of its divisors is an integer number (421346198).

Almost surely, 2^11909919879 is an apocalyptic number.

11909919879 is a deficient number, since it is larger than the sum of its proper divisors (8314697625).

11909919879 is a wasteful number, since it uses less digits than its factorization.

11909919879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6368 (or 6365 counting only the distinct ones).

The product of its (nonzero) digits is 3306744, while the sum is 63.

The spelling of 11909919879 in words is "eleven billion, nine hundred nine million, nine hundred nineteen thousand, eight hundred seventy-nine".