2945722817 has 12 divisors (see below), whose sum is σ = 3118849236. Its totient is φ = 2781773280.

The previous prime is 2945722693. The next prime is 2945722823. The reversal of 2945722817 is 7182275492.

It can be written as a sum of positive squares in 2 ways, for example, as 995970481 + 1949752336 = 31559^2 + 44156^2 .

It is not a de Polignac number, because 2945722817 - 2¹⁸ = 2945460673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2945722837) 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, 101567 + ... + 127307.

It is an arithmetic number, because the mean of its divisors is an integer number (259904103).

Almost surely, 2^2945722817 is an apocalyptic number.

It is an amenable number.

2945722817 is a deficient number, since it is larger than the sum of its proper divisors (173126419).

2945722817 is a wasteful number, since it uses less digits than its factorization.

2945722817 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26096 (or 26077 counting only the distinct ones).

The product of its digits is 564480, while the sum is 47.

The square root of 2945722817 is about 54274.5135123292. The cubic root of 2945722817 is about 1433.4986652564.

The spelling of 2945722817 in words is "two billion, nine hundred forty-five million, seven hundred twenty-two thousand, eight hundred seventeen".