1138644812886 has 32 divisors (see below), whose sum is σ = 2604364753920. Its totient is φ = 325108584576.

The previous prime is 1138644812869. The next prime is 1138644812891. The reversal of 1138644812886 is 6882184468311.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9041086 + ... + 9166161.

It is an arithmetic number, because the mean of its divisors is an integer number (81386398560).

Almost surely, 2^{1138644812886} is an apocalyptic number.

1138644812886 is an abundant number, since it is smaller than the sum of its proper divisors (1465719941034).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1138644812886 is a wasteful number, since it uses less digits than its factorization.

1138644812886 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18208748.

The product of its digits is 14155776, while the sum is 60.

The spelling of 1138644812886 in words is "one trillion, one hundred thirty-eight billion, six hundred forty-four million, eight hundred twelve thousand, eight hundred eighty-six".