13249781120 has 64 divisors (see below), whose sum is σ = 33052479840. Its totient is φ = 5069475840.

The previous prime is 13249781089. The next prime is 13249781131. The reversal of 13249781120 is 2118794231.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 435341 + ... + 464780.

Almost surely, 2^13249781120 is an apocalyptic number.

13249781120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13249781120 is an abundant number, since it is smaller than the sum of its proper divisors (19802698720).

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

13249781120 is an equidigital number, since it uses as much as digits as its factorization.

13249781120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 900163 (or 900151 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 38.

The spelling of 13249781120 in words is "thirteen billion, two hundred forty-nine million, seven hundred eighty-one thousand, one hundred twenty".