845673556 has 36 divisors (see below), whose sum is σ = 1853982228. Its totient is φ = 334551168.

The previous prime is 845673547. The next prime is 845673571. The reversal of 845673556 is 655376548.

It can be written as a sum of positive squares in 2 ways, for example, as 570445456 + 275228100 = 23884^2 + 16590^2 .

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 163401 + ... + 168496.

Almost surely, 2^845673556 is an apocalyptic number.

It is an amenable number.

845673556 is an abundant number, since it is smaller than the sum of its proper divisors (1008308672).

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

845673556 is a wasteful number, since it uses less digits than its factorization.

845673556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 331928 (or 331919 counting only the distinct ones).

The product of its digits is 3024000, while the sum is 49.

The square root of 845673556 is about 29080.4669150961. The cubic root of 845673556 is about 945.6583249998.

The spelling of 845673556 in words is "eight hundred forty-five million, six hundred seventy-three thousand, five hundred fifty-six".