15878436840 has 384 divisors, whose sum is σ = 61150003200. Its totient is φ = 3496711680.

The previous prime is 15878436797. The next prime is 15878436851. The reversal of 15878436840 is 4863487851.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 34294449 + ... + 34294911.

It is an arithmetic number, because the mean of its divisors is an integer number (159244800).

Almost surely, 2^15878436840 is an apocalyptic number.

15878436840 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 15878436840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30575001600).

15878436840 is an abundant number, since it is smaller than the sum of its proper divisors (45271566360).

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

15878436840 is a wasteful number, since it uses less digits than its factorization.

15878436840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 957 (or 950 counting only the distinct ones).

The product of its (nonzero) digits is 5160960, while the sum is 54.

The spelling of 15878436840 in words is "fifteen billion, eight hundred seventy-eight million, four hundred thirty-six thousand, eight hundred forty".