845661672 has 48 divisors (see below), whose sum is σ = 2324531040. Its totient is φ = 277678368.

The previous prime is 845661659. The next prime is 845661673. The reversal of 845661672 is 276166548.

845661672 is a `hidden beast` number, since 8 + 4 + 566 + 16 + 72 = 666.

It is not an unprimeable number, because it can be changed into a prime (845661673) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 82828 + ... + 92475.

It is an arithmetic number, because the mean of its divisors is an integer number (48427730).

Almost surely, 2^845661672 is an apocalyptic number.

It is an amenable number.

845661672 is an abundant number, since it is smaller than the sum of its proper divisors (1478869368).

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

845661672 is a wasteful number, since it uses less digits than its factorization.

845661672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175382 (or 175375 counting only the distinct ones).

The product of its digits is 483840, while the sum is 45.

The square root of 845661672 is about 29080.2625847842. The cubic root of 845661672 is about 945.6538952936.

The spelling of 845661672 in words is "eight hundred forty-five million, six hundred sixty-one thousand, six hundred seventy-two".