15120639360 has 480 divisors, whose sum is σ = 56320989120. Its totient is φ = 3861872640.

The previous prime is 15120639319. The next prime is 15120639361. The reversal of 15120639360 is 6393602151.

15120639360 is a `hidden beast` number, since 1 + 5 + 1 + 206 + 393 + 60 = 666.

It is a tau number, because it is divible by the number of its divisors (480).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15120639361) by changing a digit.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 155882832 + ... + 155882928.

It is an arithmetic number, because the mean of its divisors is an integer number (117335394).

Almost surely, 2^15120639360 is an apocalyptic number.

15120639360 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 15120639360, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28160494560).

15120639360 is an abundant number, since it is smaller than the sum of its proper divisors (41200349760).

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

15120639360 is an frugal number, since it uses more digits than its factorization.

15120639360 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 256 (or 138 counting only the distinct ones).

The product of its (nonzero) digits is 29160, while the sum is 36.

The spelling of 15120639360 in words is "fifteen billion, one hundred twenty million, six hundred thirty-nine thousand, three hundred sixty".