6881371564 has 12 divisors (see below), whose sum is σ = 12565983024. Its totient is φ = 3291090704.

The previous prime is 6881371543. The next prime is 6881371577. The reversal of 6881371564 is 4651731886.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37398667 + ... + 37398850.

It is an arithmetic number, because the mean of its divisors is an integer number (1047165252).

Almost surely, 2^6881371564 is an apocalyptic number.

It is an amenable number.

6881371564 is a deficient number, since it is larger than the sum of its proper divisors (5684611460).

6881371564 is a wasteful number, since it uses less digits than its factorization.

6881371564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74797544 (or 74797542 counting only the distinct ones).

The product of its digits is 967680, while the sum is 49.

The square root of 6881371564 is about 82954.0328374697. The cubic root of 6881371564 is about 1902.0634612504.

The spelling of 6881371564 in words is "six billion, eight hundred eighty-one million, three hundred seventy-one thousand, five hundred sixty-four".