674564136576623 has 4 divisors (see below), whose sum is σ = 674564660280000. Its totient is φ = 674563612873248.

The previous prime is 674564136576619. The next prime is 674564136576749. The reversal of 674564136576623 is 326675631465476.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 674564136576623 - 2² = 674564136576619 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 (674564136576223) 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, 259914815 + ... + 262497312.

It is an arithmetic number, because the mean of its divisors is an integer number (168641165070000).

Almost surely, 2^{674564136576623} is an apocalyptic number.

674564136576623 is a deficient number, since it is larger than the sum of its proper divisors (523703377).

674564136576623 is a wasteful number, since it uses less digits than its factorization.

674564136576623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 523703376.

The product of its digits is 2743372800, while the sum is 71.

The spelling of 674564136576623 in words is "six hundred seventy-four trillion, five hundred sixty-four billion, one hundred thirty-six million, five hundred seventy-six thousand, six hundred twenty-three".