3778145245 has 12 divisors (see below), whose sum is σ = 5273982684. Its totient is φ = 2590728000.

The previous prime is 3778145213. The next prime is 3778145251. The reversal of 3778145245 is 5425418773.

It can be written as a sum of positive squares in 2 ways, for example, as 2924862724 + 853282521 = 54082^2 + 29211^2 .

It is not a de Polignac number, because 3778145245 - 2⁵ = 3778145213 is a prime.

It is a super-2 number, since 2×3778145245² = 28548762984632220050, 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 = 3778145195 and 3778145204.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7710256 + ... + 7710745.

It is an arithmetic number, because the mean of its divisors is an integer number (439498557).

Almost surely, 2^3778145245 is an apocalyptic number.

3778145245 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

3778145245 is a deficient number, since it is larger than the sum of its proper divisors (1495837439).

3778145245 is a wasteful number, since it uses less digits than its factorization.

3778145245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15421020 (or 15421013 counting only the distinct ones).

The product of its digits is 940800, while the sum is 46.

The square root of 3778145245 is about 61466.6189488246. The cubic root of 3778145245 is about 1557.4934056868.

The spelling of 3778145245 in words is "three billion, seven hundred seventy-eight million, one hundred forty-five thousand, two hundred forty-five".