2820749465 has 4 divisors (see below), whose sum is σ = 3384899364. Its totient is φ = 2256599568.

The previous prime is 2820749453. The next prime is 2820749471. The reversal of 2820749465 is 5649470282.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 322849024 + 2497900441 = 17968^2 + 49979^2 .

It is a cyclic number.

It is not a de Polignac number, because 2820749465 - 2⁶ = 2820749401 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 282074942 + ... + 282074951.

It is an arithmetic number, because the mean of its divisors is an integer number (846224841).

Almost surely, 2^2820749465 is an apocalyptic number.

It is an amenable number.

2820749465 is a deficient number, since it is larger than the sum of its proper divisors (564149899).

2820749465 is an equidigital number, since it uses as much as digits as its factorization.

2820749465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 564149898.

The product of its (nonzero) digits is 967680, while the sum is 47.

The square root of 2820749465 is about 53110.7283418332. The cubic root of 2820749465 is about 1412.9327928484.

The spelling of 2820749465 in words is "two billion, eight hundred twenty million, seven hundred forty-nine thousand, four hundred sixty-five".