3813773808564 has 36 divisors (see below), whose sum is σ = 9822266511876. Its totient is φ = 1247271936768.

The previous prime is 3813773808451. The next prime is 3813773808613. The reversal of 3813773808564 is 4658083773183.

3813773808564 is a `hidden beast` number, since 3 + 8 + 1 + 37 + 7 + 38 + 0 + 8 + 564 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1623101480100 + 2190672328464 = 1274010^2 + 1480092^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 999414709 + ... + 999418524.

It is an arithmetic number, because the mean of its divisors is an integer number (272840736441).

Almost surely, 2^{3813773808564} is an apocalyptic number.

It is an amenable number.

3813773808564 is an abundant number, since it is smaller than the sum of its proper divisors (6008492703312).

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

3813773808564 is a wasteful number, since it uses less digits than its factorization.

3813773808564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1998833296 (or 1998833291 counting only the distinct ones).

The product of its (nonzero) digits is 81285120, while the sum is 63.

The spelling of 3813773808564 in words is "three trillion, eight hundred thirteen billion, seven hundred seventy-three million, eight hundred eight thousand, five hundred sixty-four".