13781897480 has 96 divisors (see below), whose sum is σ = 33621625800. Its totient is φ = 5054330880.

The previous prime is 13781897461. The next prime is 13781897489. The reversal of 13781897480 is 8479818731.

It can be written as a sum of positive squares in 12 ways, for example, as 1513676836 + 12268220644 = 38906^2 + 110762^2 .

It is not an unprimeable number, because it can be changed into a prime (13781897489) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 17035316 + ... + 17036124.

Almost surely, 2^13781897480 is an apocalyptic number.

13781897480 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 13781897480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16810812900).

13781897480 is an abundant number, since it is smaller than the sum of its proper divisors (19839728320).

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

13781897480 is a wasteful number, since it uses less digits than its factorization.

13781897480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1195 (or 1010 counting only the distinct ones).

The product of its (nonzero) digits is 2709504, while the sum is 56.

The spelling of 13781897480 in words is "thirteen billion, seven hundred eighty-one million, eight hundred ninety-seven thousand, four hundred eighty".