2745821313 has 12 divisors (see below), whose sum is σ = 3967072980. Its totient is φ = 1830138336.

The previous prime is 2745821293. The next prime is 2745821327. The reversal of 2745821313 is 3131285472.

2745821313 is a `hidden beast` number, since 2 + 74 + 582 + 1 + 3 + 1 + 3 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 2126408769 + 619412544 = 46113^2 + 24888^2 .

It is not a de Polignac number, because 2745821313 - 2¹⁰ = 2745820289 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2745821333) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11623 + ... + 75011.

It is an arithmetic number, because the mean of its divisors is an integer number (330589415).

Almost surely, 2^2745821313 is an apocalyptic number.

It is an amenable number.

2745821313 is a deficient number, since it is larger than the sum of its proper divisors (1221251667).

2745821313 is a wasteful number, since it uses less digits than its factorization.

2745821313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68208 (or 68205 counting only the distinct ones).

The product of its digits is 40320, while the sum is 36.

The square root of 2745821313 is about 52400.5850444439. The cubic root of 2745821313 is about 1400.3096786032.

The spelling of 2745821313 in words is "two billion, seven hundred forty-five million, eight hundred twenty-one thousand, three hundred thirteen".