13155542520 has 128 divisors (see below), whose sum is σ = 40471280640. Its totient is φ = 3419456000.

The previous prime is 13155542489. The next prime is 13155542537. The reversal of 13155542520 is 2524555131.

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, 1410994 + ... + 1420286.

It is an arithmetic number, because the mean of its divisors is an integer number (316181880).

Almost surely, 2^13155542520 is an apocalyptic number.

13155542520 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 13155542520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20235640320).

13155542520 is an abundant number, since it is smaller than the sum of its proper divisors (27315738120).

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

13155542520 is a wasteful number, since it uses less digits than its factorization.

13155542520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9605 (or 9601 counting only the distinct ones).

The product of its (nonzero) digits is 30000, while the sum is 33.

The spelling of 13155542520 in words is "thirteen billion, one hundred fifty-five million, five hundred forty-two thousand, five hundred twenty".