855645650 has 12 divisors (see below), whose sum is σ = 1591501002. Its totient is φ = 342258240.

The previous prime is 855645647. The next prime is 855645731. The reversal of 855645650 is 56546558.

It can be written as a sum of positive squares in 3 ways, for example, as 786073369 + 69572281 = 28037^2 + 8341^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8556407 + ... + 8556506.

Almost surely, 2^855645650 is an apocalyptic number.

855645650 is a deficient number, since it is larger than the sum of its proper divisors (735855352).

855645650 is a wasteful number, since it uses less digits than its factorization.

855645650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17112925 (or 17112920 counting only the distinct ones).

The product of its (nonzero) digits is 720000, while the sum is 44.

The square root of 855645650 is about 29251.4213329882. The cubic root of 855645650 is about 949.3608443136.

The spelling of 855645650 in words is "eight hundred fifty-five million, six hundred forty-five thousand, six hundred fifty".