2609445905917 has 4 divisors (see below), whose sum is σ = 2610609281280. Its totient is φ = 2608282530556.

The previous prime is 2609445905867. The next prime is 2609445905921. The reversal of 2609445905917 is 7195095449062.

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 2609445905917 - 2⁷ = 2609445905789 is a prime.

It is a super-2 number, since 2×2609445905917² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2609445906917) 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, 581684317 + ... + 581688802.

It is an arithmetic number, because the mean of its divisors is an integer number (652652320320).

Almost surely, 2^{2609445905917} is an apocalyptic number.

It is an amenable number.

2609445905917 is a deficient number, since it is larger than the sum of its proper divisors (1163375363).

2609445905917 is a wasteful number, since it uses less digits than its factorization.

2609445905917 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1163375362.

The product of its (nonzero) digits is 24494400, while the sum is 61.

The spelling of 2609445905917 in words is "two trillion, six hundred nine billion, four hundred forty-five million, nine hundred five thousand, nine hundred seventeen".