2790561569 has 4 divisors (see below), whose sum is σ = 2886787860. Its totient is φ = 2694335280.

The previous prime is 2790561551. The next prime is 2790561589. The reversal of 2790561569 is 9651650972.

It is a happy number.

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 557526544 + 2233035025 = 23612^2 + 47255^2 .

It is a cyclic number.

It is not a de Polignac number, because 2790561569 - 2²⁰ = 2789512993 is a prime.

It is a super-2 number, since 2×2790561569² = 15574467740759483522, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2790561589) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48113102 + ... + 48113159.

It is an arithmetic number, because the mean of its divisors is an integer number (721696965).

Almost surely, 2^2790561569 is an apocalyptic number.

2790561569 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

It is an amenable number.

2790561569 is a deficient number, since it is larger than the sum of its proper divisors (96226291).

2790561569 is an equidigital number, since it uses as much as digits as its factorization.

2790561569 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96226290.

The product of its (nonzero) digits is 1020600, while the sum is 50.

The square root of 2790561569 is about 52825.7661468341. The cubic root of 2790561569 is about 1407.8742625711.

The spelling of 2790561569 in words is "two billion, seven hundred ninety million, five hundred sixty-one thousand, five hundred sixty-nine".