16981425520 has 40 divisors (see below), whose sum is σ = 40755427200. Its totient is φ = 6573454080.

The previous prime is 16981425509. The next prime is 16981425529. The reversal of 16981425520 is 2552418961.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16981425529) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3421195 + ... + 3426154.

It is an arithmetic number, because the mean of its divisors is an integer number (1018885680).

Almost surely, 2^16981425520 is an apocalyptic number.

16981425520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16981425520 is an abundant number, since it is smaller than the sum of its proper divisors (23774001680).

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

16981425520 is a wasteful number, since it uses less digits than its factorization.

16981425520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6847393 (or 6847387 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 43.

The spelling of 16981425520 in words is "sixteen billion, nine hundred eighty-one million, four hundred twenty-five thousand, five hundred twenty".