15115505520 has 80 divisors (see below), whose sum is σ = 47557491840. Its totient is φ = 3970636032.

The previous prime is 15115505519. The next prime is 15115505521. The reversal of 15115505520 is 2550551151.

15115505520 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (15115505519) and next prime (15115505521).

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15115505521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 453930 + ... + 486089.

It is an arithmetic number, because the mean of its divisors is an integer number (594468648).

Almost surely, 2^15115505520 is an apocalyptic number.

15115505520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15115505520 is an abundant number, since it is smaller than the sum of its proper divisors (32441986320).

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

15115505520 is a wasteful number, since it uses less digits than its factorization.

15115505520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 940102 (or 940096 counting only the distinct ones).

The product of its (nonzero) digits is 6250, while the sum is 30.

The spelling of 15115505520 in words is "fifteen billion, one hundred fifteen million, five hundred five thousand, five hundred twenty".