15878408520 has 192 divisors, whose sum is σ = 51920291520. Its totient is φ = 3882857472.

The previous prime is 15878408503. The next prime is 15878408521. The reversal of 15878408520 is 2580487851.

It is a self number, because there is not a number n which added to its sum of digits gives 15878408520.

It is not an unprimeable number, because it can be changed into a prime (15878408521) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3181467 + ... + 3186453.

It is an arithmetic number, because the mean of its divisors is an integer number (270418185).

Almost surely, 2^15878408520 is an apocalyptic number.

15878408520 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 15878408520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25960145760).

15878408520 is an abundant number, since it is smaller than the sum of its proper divisors (36041883000).

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

15878408520 is a wasteful number, since it uses less digits than its factorization.

15878408520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5184 (or 5167 counting only the distinct ones).

The product of its (nonzero) digits is 716800, while the sum is 48.

The spelling of 15878408520 in words is "fifteen billion, eight hundred seventy-eight million, four hundred eight thousand, five hundred twenty".