3806778743878 has 16 divisors (see below), whose sum is σ = 6231088959696. Its totient is φ = 1729849904640.

The previous prime is 3806778743843. The next prime is 3806778744001. The reversal of 3806778743878 is 8783478776083.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25126251 + ... + 25277302.

It is an arithmetic number, because the mean of its divisors is an integer number (389443059981).

Almost surely, 2^{3806778743878} is an apocalyptic number.

3806778743878 is a deficient number, since it is larger than the sum of its proper divisors (2424310215818).

3806778743878 is a wasteful number, since it uses less digits than its factorization.

3806778743878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50406999.

The product of its (nonzero) digits is 2124251136, while the sum is 76.

The spelling of 3806778743878 in words is "three trillion, eight hundred six billion, seven hundred seventy-eight million, seven hundred forty-three thousand, eight hundred seventy-eight".