674544785 has 24 divisors (see below), whose sum is σ = 889575480. Its totient is φ = 490348544.

The previous prime is 674544749. The next prime is 674544797. The reversal of 674544785 is 587445476.

It is a Cunningham number, because it is equal to 25972²+1.

It can be written as a sum of positive squares in 12 ways, for example, as 9265936 + 665278849 = 3044^2 + 25793^2 .

It is not a de Polignac number, because 674544785 - 2¹² = 674540689 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 33857 + ... + 49953.

It is an arithmetic number, because the mean of its divisors is an integer number (37065645).

Almost surely, 2^674544785 is an apocalyptic number.

It is an amenable number.

674544785 is a deficient number, since it is larger than the sum of its proper divisors (215030695).

674544785 is a wasteful number, since it uses less digits than its factorization.

674544785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16165 (or 16148 counting only the distinct ones).

The product of its digits is 3763200, while the sum is 50.

The square root of 674544785 is about 25972.0000192515. Note that the first 4 decimals coincide. The cubic root of 674544785 is about 877.0080835283.

The spelling of 674544785 in words is "six hundred seventy-four million, five hundred forty-four thousand, seven hundred eighty-five".