785721428650 has 24 divisors (see below), whose sum is σ = 1486212063840. Its totient is φ = 308961645360.

The previous prime is 785721428629. The next prime is 785721428663. The reversal of 785721428650 is 56824127587.

785721428650 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 785721428591 and 785721428600.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 133170174 + ... + 133176073.

It is an arithmetic number, because the mean of its divisors is an integer number (61925502660).

Almost surely, 2^785721428650 is an apocalyptic number.

785721428650 is a deficient number, since it is larger than the sum of its proper divisors (700490635190).

785721428650 is a wasteful number, since it uses less digits than its factorization.

785721428650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 266346318 (or 266346313 counting only the distinct ones).

The product of its (nonzero) digits is 7526400, while the sum is 55.

The spelling of 785721428650 in words is "seven hundred eighty-five billion, seven hundred twenty-one million, four hundred twenty-eight thousand, six hundred fifty".