855768642 has 32 divisors (see below), whose sum is σ = 1742394240. Its totient is φ = 280156800.

The previous prime is 855768637. The next prime is 855768653. The reversal of 855768642 is 246867558.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 75328 + ... + 85940.

It is an arithmetic number, because the mean of its divisors is an integer number (54449820).

Almost surely, 2^855768642 is an apocalyptic number.

855768642 is an abundant number, since it is smaller than the sum of its proper divisors (886625598).

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

855768642 is a wasteful number, since it uses less digits than its factorization.

855768642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10858.

The product of its digits is 3225600, while the sum is 51.

The square root of 855768642 is about 29253.5235826387. The cubic root of 855768642 is about 949.4063297295.

The spelling of 855768642 in words is "eight hundred fifty-five million, seven hundred sixty-eight thousand, six hundred forty-two".