388861809201 has 6 divisors (see below), whose sum is σ = 561689279970. Its totient is φ = 259241206128.

The previous prime is 388861809191. The next prime is 388861809221. The reversal of 388861809201 is 102908168883.

388861809201 is a `hidden beast` number, since 388 + 86 + 180 + 9 + 2 + 0 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 271092042225 + 117769766976 = 520665^2 + 343176^2 .

It is not a de Polignac number, because 388861809201 - 2³⁴ = 371681940017 is a prime.

It is not an unprimeable number, because it can be changed into a prime (388861809221) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 21603433836 + ... + 21603433853.

It is an arithmetic number, because the mean of its divisors is an integer number (93614879995).

Almost surely, 2^388861809201 is an apocalyptic number.

It is an amenable number.

388861809201 is a deficient number, since it is larger than the sum of its proper divisors (172827470769).

388861809201 is a wasteful number, since it uses less digits than its factorization.

388861809201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43206867695 (or 43206867692 counting only the distinct ones).

The product of its (nonzero) digits is 1327104, while the sum is 54.

The spelling of 388861809201 in words is "three hundred eighty-eight billion, eight hundred sixty-one million, eight hundred nine thousand, two hundred one".