13551995520 has 512 divisors, whose sum is σ = 55226880000. Its totient is φ = 3076558848.

The previous prime is 13551995503. The next prime is 13551995533. The reversal of 13551995520 is 2559915531.

13551995520 is a `hidden beast` number, since 1 + 3 + 5 + 5 + 1 + 99 + 552 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 24070759 + ... + 24071321.

It is an arithmetic number, because the mean of its divisors is an integer number (107865000).

Almost surely, 2^13551995520 is an apocalyptic number.

13551995520 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 13551995520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27613440000).

13551995520 is an abundant number, since it is smaller than the sum of its proper divisors (41674884480).

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

13551995520 is a wasteful number, since it uses less digits than its factorization.

13551995520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 797 (or 779 counting only the distinct ones).

The product of its (nonzero) digits is 303750, while the sum is 45.

The spelling of 13551995520 in words is "thirteen billion, five hundred fifty-one million, nine hundred ninety-five thousand, five hundred twenty".