13209779982 has 64 divisors (see below), whose sum is σ = 31985671680. Its totient is φ = 3552771456.

The previous prime is 13209779981. The next prime is 13209779983. The reversal of 13209779982 is 28997790231.

It is an interprime number because it is at equal distance from previous prime (13209779981) and next prime (13209779983).

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13209779981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 72568 + ... + 178004.

It is an arithmetic number, because the mean of its divisors is an integer number (499776120).

Almost surely, 2^13209779982 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13209779982, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15992835840).

13209779982 is an abundant number, since it is smaller than the sum of its proper divisors (18775891698).

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

13209779982 is a wasteful number, since it uses less digits than its factorization.

13209779982 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105625.

The product of its (nonzero) digits is 3429216, while the sum is 57.

The spelling of 13209779982 in words is "thirteen billion, two hundred nine million, seven hundred seventy-nine thousand, nine hundred eighty-two".