674391591901 has 4 divisors (see below), whose sum is σ = 675207060192. Its totient is φ = 673576123612.

The previous prime is 674391591893. The next prime is 674391591917. The reversal of 674391591901 is 109195193476.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 674391591901 - 2³ = 674391591893 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 (674391591701) 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, 407732905 + ... + 407734558.

It is an arithmetic number, because the mean of its divisors is an integer number (168801765048).

Almost surely, 2^674391591901 is an apocalyptic number.

It is an amenable number.

674391591901 is a deficient number, since it is larger than the sum of its proper divisors (815468291).

674391591901 is an equidigital number, since it uses as much as digits as its factorization.

674391591901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 815468290.

The product of its (nonzero) digits is 1837080, while the sum is 55.

The spelling of 674391591901 in words is "six hundred seventy-four billion, three hundred ninety-one million, five hundred ninety-one thousand, nine hundred one".