3806778742438 has 64 divisors (see below), whose sum is σ = 6686450749440. Its totient is φ = 1591848288000.

The previous prime is 3806778742411. The next prime is 3806778742447. The reversal of 3806778742438 is 8342478776083.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 127051303 + ... + 127081261.

It is an arithmetic number, because the mean of its divisors is an integer number (104475792960).

Almost surely, 2^{3806778742438} is an apocalyptic number.

3806778742438 is a deficient number, since it is larger than the sum of its proper divisors (2879672007002).

3806778742438 is a wasteful number, since it uses less digits than its factorization.

3806778742438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31373.

The product of its (nonzero) digits is 303464448, while the sum is 67.

The spelling of 3806778742438 in words is "three trillion, eight hundred six billion, seven hundred seventy-eight million, seven hundred forty-two thousand, four hundred thirty-eight".