2609171723466 has 160 divisors (see below), whose sum is σ = 7290124237440. Its totient is φ = 677613081600.

The previous prime is 2609171723461. The next prime is 2609171723539. The reversal of 2609171723466 is 6643271719062.

2609171723466 is a `hidden beast` number, since 2 + 6 + 0 + 9 + 1 + 7 + 172 + 3 + 466 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (2609171723461) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 170649150 + ... + 170664438.

It is an arithmetic number, because the mean of its divisors is an integer number (45563276484).

Almost surely, 2^{2609171723466} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2609171723466, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3645062118720).

2609171723466 is an abundant number, since it is smaller than the sum of its proper divisors (4680952513974).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2609171723466 is a wasteful number, since it uses less digits than its factorization.

2609171723466 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29002 (or 28993 counting only the distinct ones).

The product of its (nonzero) digits is 4572288, while the sum is 54.

The spelling of 2609171723466 in words is "two trillion, six hundred nine billion, one hundred seventy-one million, seven hundred twenty-three thousand, four hundred sixty-six".