674857485749 has 4 divisors (see below), whose sum is σ = 675141399564. Its totient is φ = 674573571936.

The previous prime is 674857485721. The next prime is 674857485751. The reversal of 674857485749 is 947584758476.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 284584906225 + 390272579524 = 533465^2 + 624718^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-674857485749 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (674857485949) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 141953342 + ... + 141958095.

It is an arithmetic number, because the mean of its divisors is an integer number (168785349891).

Almost surely, 2^674857485749 is an apocalyptic number.

It is an amenable number.

674857485749 is a deficient number, since it is larger than the sum of its proper divisors (283913815).

674857485749 is a wasteful number, since it uses less digits than its factorization.

674857485749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 283913814.

The product of its digits is 1896652800, while the sum is 74.

The spelling of 674857485749 in words is "six hundred seventy-four billion, eight hundred fifty-seven million, four hundred eighty-five thousand, seven hundred forty-nine".