6898945140 has 72 divisors (see below), whose sum is σ = 21648430440. Its totient is φ = 1776278784.

The previous prime is 6898945133. The next prime is 6898945199. The reversal of 6898945140 is 415498986.

6898945140 is a `hidden beast` number, since 68 + 98 + 9 + 451 + 40 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 139145616 + 6759799524 = 11796^2 + 82218^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 655599 + ... + 666038.

It is an arithmetic number, because the mean of its divisors is an integer number (300672645).

Almost surely, 2^6898945140 is an apocalyptic number.

6898945140 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6898945140 is an abundant number, since it is smaller than the sum of its proper divisors (14749485300).

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

6898945140 is a wasteful number, since it uses less digits than its factorization.

6898945140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1321681 (or 1321676 counting only the distinct ones).

The product of its (nonzero) digits is 2488320, while the sum is 54.

The square root of 6898945140 is about 83059.8888754373. Note that the first 4 decimals coincide. The cubic root of 6898945140 is about 1903.6812415824.

The spelling of 6898945140 in words is "six billion, eight hundred ninety-eight million, nine hundred forty-five thousand, one hundred forty".