2081769660 has 120 divisors (see below), whose sum is σ = 6741415296. Its totient is φ = 537217920.

The previous prime is 2081769607. The next prime is 2081769661. The reversal of 2081769660 is 669671802.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2081769661) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 29494 + ... + 70946.

Almost surely, 2^2081769660 is an apocalyptic number.

2081769660 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 2081769660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3370707648).

2081769660 is an abundant number, since it is smaller than the sum of its proper divisors (4659645636).

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

2081769660 is a wasteful number, since it uses less digits than its factorization.

2081769660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41505 (or 41494 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 45.

The square root of 2081769660 is about 45626.4140602787. The cubic root of 2081769660 is about 1276.8627719789.

The spelling of 2081769660 in words is "two billion, eighty-one million, seven hundred sixty-nine thousand, six hundred sixty".