13449745680 has 160 divisors (see below), whose sum is σ = 48938605824. Its totient is φ = 2991126528.

The previous prime is 13449745667. The next prime is 13449745693. The reversal of 13449745680 is 8654794431.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (13449745667) and next prime (13449745693).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 46027 + ... + 170346.

Almost surely, 2^13449745680 is an apocalyptic number.

13449745680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13449745680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24469302912).

13449745680 is an abundant number, since it is smaller than the sum of its proper divisors (35488860144).

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

13449745680 is a wasteful number, since it uses less digits than its factorization.

13449745680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216433 (or 216427 counting only the distinct ones).

The product of its (nonzero) digits is 2903040, while the sum is 51.

The spelling of 13449745680 in words is "thirteen billion, four hundred forty-nine million, seven hundred forty-five thousand, six hundred eighty".