1779622945 has 4 divisors (see below), whose sum is σ = 2135547540. Its totient is φ = 1423698352.

The previous prime is 1779622937. The next prime is 1779622969. The reversal of 1779622945 is 5492269771.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5492269771 = 941 ⋅5836631.

It can be written as a sum of positive squares in 2 ways, for example, as 428986944 + 1350636001 = 20712^2 + 36751^2 .

It is a cyclic number.

It is not a de Polignac number, because 1779622945 - 2³ = 1779622937 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1779622892 and 1779622901.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 177962290 + ... + 177962299.

It is an arithmetic number, because the mean of its divisors is an integer number (533886885).

Almost surely, 2^1779622945 is an apocalyptic number.

It is an amenable number.

1779622945 is a deficient number, since it is larger than the sum of its proper divisors (355924595).

1779622945 is an equidigital number, since it uses as much as digits as its factorization.

1779622945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 355924594.

The product of its digits is 1905120, while the sum is 52.

The square root of 1779622945 is about 42185.5774524896. The cubic root of 1779622945 is about 1211.8326950584.

The spelling of 1779622945 in words is "one billion, seven hundred seventy-nine million, six hundred twenty-two thousand, nine hundred forty-five".