6981889825 has 12 divisors (see below), whose sum is σ = 8891532220. Its totient is φ = 5434551360.

The previous prime is 6981889819. The next prime is 6981889861. The reversal of 6981889825 is 5289881896.

It can be written as a sum of positive squares in 6 ways, for example, as 340291809 + 6641598016 = 18447^2 + 81496^2 .

It is not a de Polignac number, because 6981889825 - 2⁵ = 6981889793 is a prime.

It is a hoax number, since the sum of its digits (64) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3773070 + ... + 3774919.

Almost surely, 2^6981889825 is an apocalyptic number.

It is an amenable number.

6981889825 is a deficient number, since it is larger than the sum of its proper divisors (1909642395).

6981889825 is a wasteful number, since it uses less digits than its factorization.

6981889825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7548036 (or 7548031 counting only the distinct ones).

The product of its digits is 19906560, while the sum is 64.

The square root of 6981889825 is about 83557.7035646624. The cubic root of 6981889825 is about 1911.2800666915.

The spelling of 6981889825 in words is "six billion, nine hundred eighty-one million, eight hundred eighty-nine thousand, eight hundred twenty-five".