13115027520 has 840 divisors, whose sum is σ = 55920144192. Its totient is φ = 2856591360.

The previous prime is 13115027473. The next prime is 13115027581. The reversal of 13115027520 is 2572051131.

13115027520 is a `hidden beast` number, since 1 + 3 + 115 + 0 + 27 + 520 = 666.

It is a tau number, because it is divible by the number of its divisors (840).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 305000619 + ... + 305000661.

Almost surely, 2^13115027520 is an apocalyptic number.

13115027520 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 13115027520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27960072096).

13115027520 is an abundant number, since it is smaller than the sum of its proper divisors (42805116672).

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

13115027520 is an equidigital number, since it uses as much as digits as its factorization.

13115027520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161 (or 101 counting only the distinct ones).

The product of its (nonzero) digits is 2100, while the sum is 27.

Adding to 13115027520 its reverse (2572051131), we get a palindrome (15687078651).

The spelling of 13115027520 in words is "thirteen billion, one hundred fifteen million, twenty-seven thousand, five hundred twenty".