2081915469 has 6 divisors (see below), whose sum is σ = 3007211246. Its totient is φ = 1387943640.

The previous prime is 2081915467. The next prime is 2081915509. The reversal of 2081915469 is 9645191802.

2081915469 is a `hidden beast` number, since 20 + 81 + 9 + 1 + 546 + 9 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1904013225 + 177902244 = 43635^2 + 13338^2 .

It is not a de Polignac number, because 2081915469 - 2¹ = 2081915467 is a prime.

It is a super-2 number, since 2×2081915469² = 8668744040122979922, which 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 (2081915467) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 115661962 + ... + 115661979.

Almost surely, 2^2081915469 is an apocalyptic number.

It is an amenable number.

2081915469 is a deficient number, since it is larger than the sum of its proper divisors (925295777).

2081915469 is a wasteful number, since it uses less digits than its factorization.

2081915469 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 231323947 (or 231323944 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 45.

The square root of 2081915469 is about 45628.0118896276. The cubic root of 2081915469 is about 1276.8925821513.

The spelling of 2081915469 in words is "two billion, eighty-one million, nine hundred fifteen thousand, four hundred sixty-nine".