15681808842 has 16 divisors (see below), whose sum is σ = 35844134592. Its totient is φ = 4480516800.

The previous prime is 15681808823. The next prime is 15681808843. The reversal of 15681808842 is 24880818651.

It is not an unprimeable number, because it can be changed into a prime (15681808843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 186688159 + ... + 186688242.

It is an arithmetic number, because the mean of its divisors is an integer number (2240258412).

Almost surely, 2^15681808842 is an apocalyptic number.

15681808842 is an abundant number, since it is smaller than the sum of its proper divisors (20162325750).

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

15681808842 is a wasteful number, since it uses less digits than its factorization.

15681808842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 373376413.

The product of its (nonzero) digits is 983040, while the sum is 51.

The spelling of 15681808842 in words is "fifteen billion, six hundred eighty-one million, eight hundred eight thousand, eight hundred forty-two".