3777381378 has 40 divisors (see below), whose sum is σ = 8518101372. Its totient is φ = 1251098784.

The previous prime is 3777381371. The next prime is 3777381383. The reversal of 3777381378 is 8731837773.

It can be written as a sum of positive squares in 2 ways, for example, as 2928649689 + 848731689 = 54117^2 + 29133^2 .

It is a super-2 number, since 2×3777381378² = 28537220149722357768, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (3777381371) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 48825 + ... + 99692.

Almost surely, 2^3777381378 is an apocalyptic number.

3777381378 is an abundant number, since it is smaller than the sum of its proper divisors (4740719994).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3777381378 is a wasteful number, since it uses less digits than its factorization.

3777381378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148688 (or 148679 counting only the distinct ones).

The product of its digits is 4148928, while the sum is 54.

The square root of 3777381378 is about 61460.4049612431. The cubic root of 3777381378 is about 1557.3884337208.

The spelling of 3777381378 in words is "three billion, seven hundred seventy-seven million, three hundred eighty-one thousand, three hundred seventy-eight".