15840463680 has 560 divisors, whose sum is σ = 58861756800. Its totient is φ = 4040036352.

The previous prime is 15840463651. The next prime is 15840463697. The reversal of 15840463680 is 8636404851.

15840463680 is a `hidden beast` number, since 1 + 5 + 8 + 4 + 0 + 4 + 636 + 8 + 0 = 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 pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 79600221 + ... + 79600419.

It is an arithmetic number, because the mean of its divisors is an integer number (105110280).

Almost surely, 2^15840463680 is an apocalyptic number.

15840463680 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 15840463680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29430878400).

15840463680 is an abundant number, since it is smaller than the sum of its proper divisors (43021293120).

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

15840463680 is a wasteful number, since it uses less digits than its factorization.

15840463680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 348 (or 329 counting only the distinct ones).

The product of its (nonzero) digits is 552960, while the sum is 45.

The spelling of 15840463680 in words is "fifteen billion, eight hundred forty million, four hundred sixty-three thousand, six hundred eighty".