11907191889 has 80 divisors (see below), whose sum is σ = 18647280960. Its totient is φ = 7565270400.

The previous prime is 11907191873. The next prime is 11907191917. The reversal of 11907191889 is 98819170911.

It is not a de Polignac number, because 11907191889 - 2⁴ = 11907191873 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11907191819) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 42074742 + ... + 42075024.

It is an arithmetic number, because the mean of its divisors is an integer number (233091012).

Almost surely, 2^11907191889 is an apocalyptic number.

It is an amenable number.

11907191889 is a deficient number, since it is larger than the sum of its proper divisors (6740089071).

11907191889 is a wasteful number, since it uses less digits than its factorization.

11907191889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 572 (or 563 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 54.

The spelling of 11907191889 in words is "eleven billion, nine hundred seven million, one hundred ninety-one thousand, eight hundred eighty-nine".