31490443873609 has 4 divisors (see below), whose sum is σ = 35989078712704. Its totient is φ = 26991809034516.

The previous prime is 31490443873601. The next prime is 31490443873639. The reversal of 31490443873609 is 90637834409413.

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 31490443873609 - 2³ = 31490443873601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31490443873601) 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, 2249317419537 + ... + 2249317419550.

It is an arithmetic number, because the mean of its divisors is an integer number (8997269678176).

Almost surely, 2^{31490443873609} is an apocalyptic number.

It is an amenable number.

31490443873609 is a deficient number, since it is larger than the sum of its proper divisors (4498634839095).

31490443873609 is an equidigital number, since it uses as much as digits as its factorization.

31490443873609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4498634839094.

The product of its (nonzero) digits is 47029248, while the sum is 61.

The spelling of 31490443873609 in words is "thirty-one trillion, four hundred ninety billion, four hundred forty-three million, eight hundred seventy-three thousand, six hundred nine".