13499990874 has 56 divisors (see below), whose sum is σ = 30457909620. Its totient is φ = 4485647808.

The previous prime is 13499990857. The next prime is 13499990879. The reversal of 13499990874 is 47809999431.

It can be written as a sum of positive squares in 2 ways, for example, as 12200748849 + 1299242025 = 110457^2 + 36045^2 .

It is not an unprimeable number, because it can be changed into a prime (13499990879) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 447582 + ... + 476790.

Almost surely, 2^13499990874 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13499990874, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15228954810).

13499990874 is an abundant number, since it is smaller than the sum of its proper divisors (16957918746).

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

13499990874 is an equidigital number, since it uses as much as digits as its factorization.

13499990874 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29546 (or 29531 counting only the distinct ones).

The product of its (nonzero) digits is 17635968, while the sum is 63.

The spelling of 13499990874 in words is "thirteen billion, four hundred ninety-nine million, nine hundred ninety thousand, eight hundred seventy-four".