2773557045 has 168 divisors, whose sum is σ = 5934544056. Its totient is φ = 1239743232.

The previous prime is 2773557029. The next prime is 2773557047. The reversal of 2773557045 is 5407553772.

2773557045 is a `hidden beast` number, since 2 + 7 + 7 + 35 + 570 + 45 = 666.

2773557045 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 1183222404 + 1590334641 = 34398^2 + 39879^2 .

It is not a de Polignac number, because 2773557045 - 2⁴ = 2773557029 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2773557047) by changing a digit.

It is a polite number, since it can be written in 167 ways as a sum of consecutive naturals, for example, 9465919 + ... + 9466211.

It is an arithmetic number, because the mean of its divisors is an integer number (35324667).

Almost surely, 2^2773557045 is an apocalyptic number.

It is an amenable number.

2773557045 is an abundant number, since it is smaller than the sum of its proper divisors (3160987011).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2773557045 is an equidigital number, since it uses as much as digits as its factorization.

2773557045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 383 (or 361 counting only the distinct ones).

The product of its (nonzero) digits is 1029000, while the sum is 45.

The square root of 2773557045 is about 52664.5710606286. The cubic root of 2773557045 is about 1405.0087671426.

The spelling of 2773557045 in words is "two billion, seven hundred seventy-three million, five hundred fifty-seven thousand, forty-five".