11898876887 has 4 divisors (see below), whose sum is σ = 11899433160. Its totient is φ = 11898320616.

The previous prime is 11898876839. The next prime is 11898876889. The reversal of 11898876887 is 78867889811.

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 11898876887 - 2²⁰ = 11897828311 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11898876887.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11898876889) 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, 244712 + ... + 289277.

It is an arithmetic number, because the mean of its divisors is an integer number (2974858290).

Almost surely, 2^11898876887 is an apocalyptic number.

11898876887 is a deficient number, since it is larger than the sum of its proper divisors (556273).

11898876887 is an equidigital number, since it uses as much as digits as its factorization.

11898876887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 556272.

The product of its digits is 86704128, while the sum is 71.

The spelling of 11898876887 in words is "eleven billion, eight hundred ninety-eight million, eight hundred seventy-six thousand, eight hundred eighty-seven".