3778209745 has 8 divisors (see below), whose sum is σ = 4534949160. Its totient is φ = 3021836160.

The previous prime is 3778209731. The next prime is 3778209767. The reversal of 3778209745 is 5479028773.

It can be written as a sum of positive squares in 4 ways, for example, as 2311013329 + 1467196416 = 48073^2 + 38304^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 3778209745 - 2⁵ = 3778209713 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3778209692 and 3778209701.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 68196 + ... + 110485.

It is an arithmetic number, because the mean of its divisors is an integer number (566868645).

Almost surely, 2^3778209745 is an apocalyptic number.

It is an amenable number.

3778209745 is a deficient number, since it is larger than the sum of its proper divisors (756739415).

3778209745 is a wasteful number, since it uses less digits than its factorization.

3778209745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182915.

The product of its (nonzero) digits is 2963520, while the sum is 52.

The square root of 3778209745 is about 61467.1436216130. The cubic root of 3778209745 is about 1557.5022687441.

The spelling of 3778209745 in words is "three billion, seven hundred seventy-eight million, two hundred nine thousand, seven hundred forty-five".