674389520891 has 8 divisors (see below), whose sum is σ = 704756453280. Its totient is φ = 644109725952.

The previous prime is 674389520887. The next prime is 674389520939. The reversal of 674389520891 is 198025983476.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 674389520891 - 2² = 674389520887 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (674389520851) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21768536 + ... + 21799493.

It is an arithmetic number, because the mean of its divisors is an integer number (88094556660).

It is a 1-persistent number, because it is pandigital, but 2⋅674389520891 = 1348779041782 is not.

Almost surely, 2^674389520891 is an apocalyptic number.

674389520891 is a deficient number, since it is larger than the sum of its proper divisors (30366932389).

674389520891 is a wasteful number, since it uses less digits than its factorization.

674389520891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43568725.

The product of its (nonzero) digits is 26127360, while the sum is 62.

The spelling of 674389520891 in words is "six hundred seventy-four billion, three hundred eighty-nine million, five hundred twenty thousand, eight hundred ninety-one".