855645372 has 18 divisors (see below), whose sum is σ = 2162881448. Its totient is φ = 285215112.

The previous prime is 855645367. The next prime is 855645431. The reversal of 855645372 is 273546558.

855645372 is a `hidden beast` number, since 8 + 55 + 64 + 537 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (18).

It is a congruent 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, 11883928 + ... + 11883999.

Almost surely, 2^855645372 is an apocalyptic number.

It is an amenable number.

855645372 is an abundant number, since it is smaller than the sum of its proper divisors (1307236076).

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

855645372 is a wasteful number, since it uses less digits than its factorization.

855645372 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23767937 (or 23767932 counting only the distinct ones).

The product of its digits is 1008000, while the sum is 45.

The square root of 855645372 is about 29251.4165810820. The cubic root of 855645372 is about 949.3607414976.

The spelling of 855645372 in words is "eight hundred fifty-five million, six hundred forty-five thousand, three hundred seventy-two".