1778408445 has 16 divisors (see below), whose sum is σ = 3104131392. Its totient is φ = 862258560.

The previous prime is 1778408431. The next prime is 1778408453. The reversal of 1778408445 is 5448048771.

1778408445 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1778408445 - 2⁹ = 1778407933 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1778408394 and 1778408403.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5388952 + ... + 5389281.

It is an arithmetic number, because the mean of its divisors is an integer number (194008212).

Almost surely, 2^1778408445 is an apocalyptic number.

1778408445 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1778408445 is a deficient number, since it is larger than the sum of its proper divisors (1325722947).

1778408445 is a wasteful number, since it uses less digits than its factorization.

1778408445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10778252.

The product of its (nonzero) digits is 1003520, while the sum is 48.

The square root of 1778408445 is about 42171.1802656743. The cubic root of 1778408445 is about 1211.5569614184.

The spelling of 1778408445 in words is "one billion, seven hundred seventy-eight million, four hundred eight thousand, four hundred forty-five".