3806778555840 has 112 divisors (see below), whose sum is σ = 13016254412448. Its totient is φ = 937053179904.

The previous prime is 3806778555809. The next prime is 3806778555841. The reversal of 3806778555840 is 485558776083.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3806778555841) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 152502687 + ... + 152527646.

It is an arithmetic number, because the mean of its divisors is an integer number (116216557254).

Almost surely, 2^{3806778555840} is an apocalyptic number.

3806778555840 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

3806778555840 is an abundant number, since it is smaller than the sum of its proper divisors (9209475856608).

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

3806778555840 is a wasteful number, since it uses less digits than its factorization.

3806778555840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 305030366 (or 305030356 counting only the distinct ones).

The product of its (nonzero) digits is 225792000, while the sum is 66.

The spelling of 3806778555840 in words is "three trillion, eight hundred six billion, seven hundred seventy-eight million, five hundred fifty-five thousand, eight hundred forty".