674526815909 has 2 divisors, whose sum is σ = 674526815910. Its totient is φ = 674526815908.

The previous prime is 674526815861. The next prime is 674526815951. The reversal of 674526815909 is 909518625476.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 370032539809 + 304494276100 = 608303^2 + 551810^2 .

It is a cyclic number.

It is not a de Polignac number, because 674526815909 - 2¹² = 674526811813 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (674526811909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 337263407954 + 337263407955.

It is an arithmetic number, because the mean of its divisors is an integer number (337263407955).

Almost surely, 2^674526815909 is an apocalyptic number.

It is an amenable number.

674526815909 is a deficient number, since it is larger than the sum of its proper divisors (1).

674526815909 is an equidigital number, since it uses as much as digits as its factorization.

674526815909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32659200, while the sum is 62.

The spelling of 674526815909 in words is "six hundred seventy-four billion, five hundred twenty-six million, eight hundred fifteen thousand, nine hundred nine".