15382881720 has 192 divisors, whose sum is σ = 53248497120. Its totient is φ = 3991140864.

The previous prime is 15382881691. The next prime is 15382881743. The reversal of 15382881720 is 2718828351.

15382881720 is a `hidden beast` number, since 1 + 538 + 2 + 88 + 17 + 20 = 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 47 ways as a sum of consecutive naturals, for example, 338254 + ... + 381026.

Almost surely, 2^15382881720 is an apocalyptic number.

15382881720 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 15382881720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26624248560).

15382881720 is an abundant number, since it is smaller than the sum of its proper divisors (37865615400).

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

15382881720 is a wasteful number, since it uses less digits than its factorization.

15382881720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42836 (or 42820 counting only the distinct ones).

The product of its (nonzero) digits is 215040, while the sum is 45.

The spelling of 15382881720 in words is "fifteen billion, three hundred eighty-two million, eight hundred eighty-one thousand, seven hundred twenty".