15128469720 has 576 divisors, whose sum is σ = 63294678720. Its totient is φ = 3103930368.

The previous prime is 15128469709. The next prime is 15128469751. The reversal of 15128469720 is 2796482151.

15128469720 is a `hidden beast` number, since 1 + 512 + 8 + 4 + 69 + 72 + 0 = 666.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 8483949 + ... + 8485731.

It is an arithmetic number, because the mean of its divisors is an integer number (109886595).

Almost surely, 2^15128469720 is an apocalyptic number.

15128469720 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 15128469720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31647339360).

15128469720 is an abundant number, since it is smaller than the sum of its proper divisors (48166209000).

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

15128469720 is a wasteful number, since it uses less digits than its factorization.

15128469720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1864 (or 1850 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 45.

The spelling of 15128469720 in words is "fifteen billion, one hundred twenty-eight million, four hundred sixty-nine thousand, seven hundred twenty".