3806778556220 has 24 divisors (see below), whose sum is σ = 8341810402464. Its totient is φ = 1456506577856.

The previous prime is 3806778556201. The next prime is 3806778556267. The reversal of 3806778556220 is 226558776083.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 3806778556220.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4137802319 + ... + 4137803238.

It is an arithmetic number, because the mean of its divisors is an integer number (347575433436).

Almost surely, 2^{3806778556220} is an apocalyptic number.

It is an amenable number.

3806778556220 is an abundant number, since it is smaller than the sum of its proper divisors (4535031846244).

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

3806778556220 is a wasteful number, since it uses less digits than its factorization.

3806778556220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8275605589 (or 8275605587 counting only the distinct ones).

The product of its (nonzero) digits is 33868800, while the sum is 59.

The spelling of 3806778556220 in words is "three trillion, eight hundred six billion, seven hundred seventy-eight million, five hundred fifty-six thousand, two hundred twenty".