11898876643 has 4 divisors (see below), whose sum is σ = 11899095208. Its totient is φ = 11898658080.

The previous prime is 11898876641. The next prime is 11898876653. The reversal of 11898876643 is 34667889811.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 34667889811 = 23 ⋅1507299557.

It is a cyclic number.

It is not a de Polignac number, because 11898876643 - 2¹ = 11898876641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11898876641) 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, 44728 + ... + 160618.

It is an arithmetic number, because the mean of its divisors is an integer number (2974773802).

Almost surely, 2^11898876643 is an apocalyptic number.

11898876643 is a deficient number, since it is larger than the sum of its proper divisors (218565).

11898876643 is a wasteful number, since it uses less digits than its factorization.

11898876643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218564.

The product of its digits is 13934592, while the sum is 61.

The spelling of 11898876643 in words is "eleven billion, eight hundred ninety-eight million, eight hundred seventy-six thousand, six hundred forty-three".