855981964 has 18 divisors (see below), whose sum is σ = 1519399532. Its totient is φ = 421953000.

The previous prime is 855981953. The next prime is 855981967. The reversal of 855981964 is 469189558.

855981964 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (855981967) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1062 + ... + 41389.

Almost surely, 2^855981964 is an apocalyptic number.

It is an amenable number.

855981964 is a deficient number, since it is larger than the sum of its proper divisors (663417568).

855981964 is a wasteful number, since it uses less digits than its factorization.

855981964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42597 (or 42524 counting only the distinct ones).

The product of its digits is 3110400, while the sum is 55.

The square root of 855981964 is about 29257.1694461375. The cubic root of 855981964 is about 949.4852110303.

The spelling of 855981964 in words is "eight hundred fifty-five million, nine hundred eighty-one thousand, nine hundred sixty-four".