3778354645 has 8 divisors (see below), whose sum is σ = 4882796856. Its totient is φ = 2790169536.

The previous prime is 3778354627. The next prime is 3778354681. The reversal of 3778354645 is 5464538773.

It can be written as a sum of positive squares in 4 ways, for example, as 216413521 + 3561941124 = 14711^2 + 59682^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 3778354645 - 2⁹ = 3778354133 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3778354592 and 3778354601.

It is a congruent number.

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, 29064202 + ... + 29064331.

It is an arithmetic number, because the mean of its divisors is an integer number (610349607).

Almost surely, 2^3778354645 is an apocalyptic number.

It is an amenable number.

3778354645 is a deficient number, since it is larger than the sum of its proper divisors (1104442211).

3778354645 is a wasteful number, since it uses less digits than its factorization.

3778354645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58128551.

The product of its digits is 8467200, while the sum is 52.

The square root of 3778354645 is about 61468.3222888017. The cubic root of 3778354645 is about 1557.5221793375.

The spelling of 3778354645 in words is "three billion, seven hundred seventy-eight million, three hundred fifty-four thousand, six hundred forty-five".