986431108643 has 4 divisors (see below), whose sum is σ = 986543122800. Its totient is φ = 986319094488.

The previous prime is 986431108613. The next prime is 986431108669. The reversal of 986431108643 is 346801134689.

986431108643 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 346801134689 = 1999 ⋅173487311.

It is a cyclic number.

It is not a de Polignac number, because 986431108643 - 2⁸ = 986431108387 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (986431108613) 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, 55993868 + ... + 56011481.

It is an arithmetic number, because the mean of its divisors is an integer number (246635780700).

Almost surely, 2^986431108643 is an apocalyptic number.

986431108643 is a deficient number, since it is larger than the sum of its proper divisors (112014157).

986431108643 is a wasteful number, since it uses less digits than its factorization.

986431108643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112014156.

The product of its (nonzero) digits is 2985984, while the sum is 53.

The spelling of 986431108643 in words is "nine hundred eighty-six billion, four hundred thirty-one million, one hundred eight thousand, six hundred forty-three".