2779448545 has 4 divisors (see below), whose sum is σ = 3335338260. Its totient is φ = 2223558832.

The previous prime is 2779448527. The next prime is 2779448563. The reversal of 2779448545 is 5458449772.

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

It is an interprime number because it is at equal distance from previous prime (2779448527) and next prime (2779448563).

It can be written as a sum of positive squares in 2 ways, for example, as 1189353169 + 1590095376 = 34487^2 + 39876^2 .

It is a cyclic number.

It is not a de Polignac number, because 2779448545 - 2⁵ = 2779448513 is a prime.

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, 277944850 + ... + 277944859.

It is an arithmetic number, because the mean of its divisors is an integer number (833834565).

Almost surely, 2^2779448545 is an apocalyptic number.

It is an amenable number.

2779448545 is a deficient number, since it is larger than the sum of its proper divisors (555889715).

2779448545 is an equidigital number, since it uses as much as digits as its factorization.

2779448545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 555889714.

The product of its digits is 11289600, while the sum is 55.

The square root of 2779448545 is about 52720.4755763830. The cubic root of 2779448545 is about 1406.0028882795.

The spelling of 2779448545 in words is "two billion, seven hundred seventy-nine million, four hundred forty-eight thousand, five hundred forty-five".