857784412250 has 32 divisors (see below), whose sum is σ = 1620779689152. Its totient is φ = 339907083600.

The previous prime is 857784412249. The next prime is 857784412253. The reversal of 857784412250 is 52214487758.

It is a junction number, because it is equal to n+sod(n) for n = 857784412192 and 857784412201.

It is not an unprimeable number, because it can be changed into a prime (857784412253) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16006604 + ... + 16060103.

It is an arithmetic number, because the mean of its divisors is an integer number (50649365286).

Almost surely, 2^857784412250 is an apocalyptic number.

857784412250 is a deficient number, since it is larger than the sum of its proper divisors (762995276902).

857784412250 is a wasteful number, since it uses less digits than its factorization.

857784412250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32066831 (or 32066821 counting only the distinct ones).

The product of its (nonzero) digits is 5017600, while the sum is 53.

The spelling of 857784412250 in words is "eight hundred fifty-seven billion, seven hundred eighty-four million, four hundred twelve thousand, two hundred fifty".