13390861722 has 64 divisors (see below), whose sum is σ = 31226480640. Its totient is φ = 3749029056.

The previous prime is 13390861721. The next prime is 13390861739. The reversal of 13390861722 is 22716809331.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (13390861721) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 777003 + ... + 794049.

It is an arithmetic number, because the mean of its divisors is an integer number (487913760).

Almost surely, 2^13390861722 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13390861722, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15613240320).

13390861722 is an abundant number, since it is smaller than the sum of its proper divisors (17835618918).

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

13390861722 is a wasteful number, since it uses less digits than its factorization.

13390861722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17435.

The product of its (nonzero) digits is 108864, while the sum is 42.

The spelling of 13390861722 in words is "thirteen billion, three hundred ninety million, eight hundred sixty-one thousand, seven hundred twenty-two".