1373241491605 has 4 divisors (see below), whose sum is σ = 1647889789932. Its totient is φ = 1098593193280.

The previous prime is 1373241491603. The next prime is 1373241491663. The reversal of 1373241491605 is 5061941423731.

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 202606213924 + 1170635277681 = 450118^2 + 1081959^2 .

It is not a de Polignac number, because 1373241491605 - 2¹ = 1373241491603 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 (1373241491603) 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, 137324149156 + ... + 137324149165.

It is an arithmetic number, because the mean of its divisors is an integer number (411972447483).

Almost surely, 2^{1373241491605} is an apocalyptic number.

It is an amenable number.

1373241491605 is a deficient number, since it is larger than the sum of its proper divisors (274648298327).

1373241491605 is an equidigital number, since it uses as much as digits as its factorization.

1373241491605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 274648298326.

The product of its (nonzero) digits is 544320, while the sum is 46.

The spelling of 1373241491605 in words is "one trillion, three hundred seventy-three billion, two hundred forty-one million, four hundred ninety-one thousand, six hundred five".