2605171210380 has 144 divisors (see below), whose sum is σ = 8158648802304. Its totient is φ = 672188388480.

The previous prime is 2605171210373. The next prime is 2605171210391. The reversal of 2605171210380 is 830121715062.

2605171210380 is a `hidden beast` number, since 2 + 60 + 5 + 1 + 7 + 1 + 210 + 380 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 35826339 + ... + 35898981.

Almost surely, 2^{2605171210380} is an apocalyptic number.

2605171210380 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2605171210380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4079324401152).

2605171210380 is an abundant number, since it is smaller than the sum of its proper divisors (5553477591924).

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

2605171210380 is a wasteful number, since it uses less digits than its factorization.

2605171210380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79116 (or 79111 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 36.

The spelling of 2605171210380 in words is "two trillion, six hundred five billion, one hundred seventy-one million, two hundred ten thousand, three hundred eighty".