1945444266 has 24 divisors (see below), whose sum is σ = 4463078724. Its totient is φ = 610335360.

The previous prime is 1945444261. The next prime is 1945444271. The reversal of 1945444266 is 6624445491.

1945444266 is a `hidden beast` number, since 1 + 9 + 4 + 544 + 42 + 66 = 666.

It is an interprime number because it is at equal distance from previous prime (1945444261) and next prime (1945444271).

It can be written as a sum of positive squares in 2 ways, for example, as 1881043641 + 64400625 = 43371^2 + 8025^2 .

It is a super-2 number, since 2×1945444266² = 7569506784224557512, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1945444261) 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, 3178525 + ... + 3179136.

Almost surely, 2^1945444266 is an apocalyptic number.

1945444266 is an abundant number, since it is smaller than the sum of its proper divisors (2517634458).

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

1945444266 is a wasteful number, since it uses less digits than its factorization.

1945444266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6357686 (or 6357683 counting only the distinct ones).

The product of its digits is 829440, while the sum is 45.

The square root of 1945444266 is about 44107.1906382621. The cubic root of 1945444266 is about 1248.3592908143.

The spelling of 1945444266 in words is "one billion, nine hundred forty-five million, four hundred forty-four thousand, two hundred sixty-six".