1779942455 has 4 divisors (see below), whose sum is σ = 2135930952. Its totient is φ = 1423953960.

The previous prime is 1779942433. The next prime is 1779942467. The reversal of 1779942455 is 5542499771.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5542499771 = 313 ⋅17707667.

It is not a de Polignac number, because 1779942455 - 2⁶ = 1779942391 is a prime.

It is a super-2 number, since 2×1779942455² = 6336390286222854050, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1779942397 and 1779942406.

It is a congruent number.

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, 177994241 + ... + 177994250.

It is an arithmetic number, because the mean of its divisors is an integer number (533982738).

Almost surely, 2^1779942455 is an apocalyptic number.

1779942455 is a deficient number, since it is larger than the sum of its proper divisors (355988497).

1779942455 is an equidigital number, since it uses as much as digits as its factorization.

1779942455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 355988496.

The product of its digits is 3175200, while the sum is 53.

The square root of 1779942455 is about 42189.3642402917. The cubic root of 1779942455 is about 1211.9052140707.

The spelling of 1779942455 in words is "one billion, seven hundred seventy-nine million, nine hundred forty-two thousand, four hundred fifty-five".