42781857650 has 24 divisors (see below), whose sum is σ = 90942006720. Its totient is φ = 14668065360.

The previous prime is 42781857607. The next prime is 42781857653. The reversal of 42781857650 is 5675818724.

It is a junction number, because it is equal to n+sod(n) for n = 42781857592 and 42781857601.

It is not an unprimeable number, because it can be changed into a prime (42781857653) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 61116590 + ... + 61117289.

It is an arithmetic number, because the mean of its divisors is an integer number (3789250280).

Almost surely, 2^42781857650 is an apocalyptic number.

42781857650 is an abundant number, since it is smaller than the sum of its proper divisors (48160149070).

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

42781857650 is a wasteful number, since it uses less digits than its factorization.

42781857650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122233898 (or 122233893 counting only the distinct ones).

The product of its (nonzero) digits is 3763200, while the sum is 53.

The spelling of 42781857650 in words is "forty-two billion, seven hundred eighty-one million, eight hundred fifty-seven thousand, six hundred fifty".