2194266649 has 9 divisors (see below), whose sum is σ = 2216744127. Its totient is φ = 2172016224.

The previous prime is 2194266629. The next prime is 2194266689. The reversal of 2194266649 is 9466624912.

The square root of 2194266649 is 46843.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 591705625 + 1602561024 = 24325^2 + 40032^2 .

It is not a de Polignac number, because 2194266649 - 2¹³ = 2194258457 is a prime.

It is a super-2 number, since 2×2194266649² = 9629612253827378402, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2194266629) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 6511009 + ... + 6511345.

It is an arithmetic number, because the mean of its divisors is an integer number (246304903).

Almost surely, 2^2194266649 is an apocalyptic number.

2194266649 is the 46843-rd square number.

2194266649 is the 23422-nd centered octagonal number.

It is an amenable number.

2194266649 is a deficient number, since it is larger than the sum of its proper divisors (22477478).

2194266649 is an frugal number, since it uses more digits than its factorization.

2194266649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 952 (or 476 counting only the distinct ones).

The product of its digits is 1119744, while the sum is 49.

The cubic root of 2194266649 is about 1299.4606537809.

Multiplying 2194266649 by its sum of digits (49), we get a square (107519065801 = 327901²).

The spelling of 2194266649 in words is "two billion, one hundred ninety-four million, two hundred sixty-six thousand, six hundred forty-nine".