6981749520 has 40 divisors (see below), whose sum is σ = 21643424256. Its totient is φ = 1861799808.

The previous prime is 6981749491. The next prime is 6981749531. The reversal of 6981749520 is 259471896.

It is a tau number, because it is divible by the number of its divisors (40).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14545072 + ... + 14545551.

Almost surely, 2^6981749520 is an apocalyptic number.

6981749520 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6981749520 is an abundant number, since it is smaller than the sum of its proper divisors (14661674736).

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

6981749520 is a wasteful number, since it uses less digits than its factorization.

6981749520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29090639 (or 29090633 counting only the distinct ones).

The product of its (nonzero) digits is 1088640, while the sum is 51.

The square root of 6981749520 is about 83556.8639909373. The cubic root of 6981749520 is about 1911.2672638567.

The spelling of 6981749520 in words is "six billion, nine hundred eighty-one million, seven hundred forty-nine thousand, five hundred twenty".