855551964 has 12 divisors (see below), whose sum is σ = 1996287944. Its totient is φ = 285183984.

The previous prime is 855551941. The next prime is 855551971. The reversal of 855551964 is 469155558.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35647987 + ... + 35648010.

Almost surely, 2^855551964 is an apocalyptic number.

It is an amenable number.

855551964 is an abundant number, since it is smaller than the sum of its proper divisors (1140735980).

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

855551964 is a wasteful number, since it uses less digits than its factorization.

855551964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71296004 (or 71296002 counting only the distinct ones).

The product of its digits is 1080000, while the sum is 48.

The square root of 855551964 is about 29249.8198968814. The cubic root of 855551964 is about 949.3261940405.

The spelling of 855551964 in words is "eight hundred fifty-five million, five hundred fifty-one thousand, nine hundred sixty-four".