3806780202855 has 120 divisors (see below), whose sum is σ = 8107027777728. Its totient is φ = 1703215527552.

The previous prime is 3806780202851. The next prime is 3806780202887. The reversal of 3806780202855 is 5582020876083.

3806780202855 is a `hidden beast` number, since 380 + 6 + 7 + 8 + 0 + 202 + 8 + 55 = 666.

It is not a de Polignac number, because 3806780202855 - 2² = 3806780202851 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3806780202851) by changing a digit.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 1107984 + ... + 2973413.

Almost surely, 2^{3806780202855} is an apocalyptic number.

3806780202855 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

3806780202855 is an abundant number, since it is smaller than the sum of its proper divisors (4300247574873).

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

3806780202855 is a wasteful number, since it uses less digits than its factorization.

3806780202855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4081475 (or 4081459 counting only the distinct ones).

The product of its (nonzero) digits is 6451200, while the sum is 54.

The spelling of 3806780202855 in words is "three trillion, eight hundred six billion, seven hundred eighty million, two hundred two thousand, eight hundred fifty-five".