15681648850 has 144 divisors (see below), whose sum is σ = 34604928000. Its totient is φ = 5270832000.

The previous prime is 15681648781. The next prime is 15681648859. The reversal of 15681648850 is 5884618651.

It is a super-2 number, since 2×15681648850² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (15681648859) 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 71 ways as a sum of consecutive naturals, for example, 31425901 + ... + 31426399.

It is an arithmetic number, because the mean of its divisors is an integer number (240312000).

Almost surely, 2^15681648850 is an apocalyptic number.

15681648850 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

15681648850 is an abundant number, since it is smaller than the sum of its proper divisors (18923279150).

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

15681648850 is a wasteful number, since it uses less digits than its factorization.

15681648850 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 753 (or 741 counting only the distinct ones).

The product of its (nonzero) digits is 1843200, while the sum is 52.

The spelling of 15681648850 in words is "fifteen billion, six hundred eighty-one million, six hundred forty-eight thousand, eight hundred fifty".