15995786412840 has 256 divisors, whose sum is σ = 54723095078400. Its totient is φ = 3705507938304.

The previous prime is 15995786412839. The next prime is 15995786412871. The reversal of 15995786412840 is 4821468759951.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 590825544 + ... + 590852616.

It is an arithmetic number, because the mean of its divisors is an integer number (213762090150).

Almost surely, 2^{15995786412840} is an apocalyptic number.

15995786412840 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 15995786412840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27361547539200).

15995786412840 is an abundant number, since it is smaller than the sum of its proper divisors (38727308665560).

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

15995786412840 is a wasteful number, since it uses less digits than its factorization.

15995786412840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49396 (or 49392 counting only the distinct ones).

The product of its (nonzero) digits is 174182400, while the sum is 69.

The spelling of 15995786412840 in words is "fifteen trillion, nine hundred ninety-five billion, seven hundred eighty-six million, four hundred twelve thousand, eight hundred forty".