15878580840 has 96 divisors (see below), whose sum is σ = 53849128320. Its totient is φ = 4050186624.

The previous prime is 15878580829. The next prime is 15878580841. The reversal of 15878580840 is 4808587851.

15878580840 is a `hidden beast` number, since 1 + 58 + 7 + 8 + 580 + 8 + 4 + 0 = 666.

It is not an unprimeable number, because it can be changed into a prime (15878580841) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 950572 + ... + 967131.

It is an arithmetic number, because the mean of its divisors is an integer number (560928420).

Almost surely, 2^15878580840 is an apocalyptic number.

15878580840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15878580840 is an abundant number, since it is smaller than the sum of its proper divisors (37970547480).

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

15878580840 is a wasteful number, since it uses less digits than its factorization.

15878580840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1917743 (or 1917736 counting only the distinct ones).

The product of its (nonzero) digits is 2867200, while the sum is 54.

The spelling of 15878580840 in words is "fifteen billion, eight hundred seventy-eight million, five hundred eighty thousand, eight hundred forty".