13649054520 has 128 divisors (see below), whose sum is σ = 43878723840. Its totient is φ = 3384330240.

The previous prime is 13649054501. The next prime is 13649054561. The reversal of 13649054520 is 2545094631.

It is a congruent number.

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, 129015 + ... + 209625.

It is an arithmetic number, because the mean of its divisors is an integer number (342802530).

Almost surely, 2^13649054520 is an apocalyptic number.

13649054520 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 13649054520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21939361920).

13649054520 is an abundant number, since it is smaller than the sum of its proper divisors (30229669320).

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

13649054520 is a wasteful number, since it uses less digits than its factorization.

13649054520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80725 (or 80721 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 39.

The spelling of 13649054520 in words is "thirteen billion, six hundred forty-nine million, fifty-four thousand, five hundred twenty".