13990821610 has 8 divisors (see below), whose sum is σ = 25183478916. Its totient is φ = 5596328640.

The previous prime is 13990821599. The next prime is 13990821613. The reversal of 13990821610 is 1612809931.

It can be written as a sum of positive squares in 2 ways, for example, as 13987556361 + 3265249 = 118269^2 + 1807^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (13990821613) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 699541071 + ... + 699541090.

Almost surely, 2^13990821610 is an apocalyptic number.

13990821610 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

13990821610 is a deficient number, since it is larger than the sum of its proper divisors (11192657306).

13990821610 is a wasteful number, since it uses less digits than its factorization.

13990821610 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1399082168.

The product of its (nonzero) digits is 23328, while the sum is 40.

The spelling of 13990821610 in words is "thirteen billion, nine hundred ninety million, eight hundred twenty-one thousand, six hundred ten".