204785100801 has 10 divisors (see below), whose sum is σ = 305913545762. Its totient is φ = 136523400480.

The previous prime is 204785100799. The next prime is 204785100827. The reversal of 204785100801 is 108001587402.

204785100801 is a `hidden beast` number, since 2 + 0 + 478 + 5 + 100 + 80 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 125485977600 + 79299123201 = 354240^2 + 281601^2 .

It is not a de Polignac number, because 204785100801 - 2¹ = 204785100799 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (204785100841) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 1264105480 + ... + 1264105641.

Almost surely, 2^204785100801 is an apocalyptic number.

It is an amenable number.

204785100801 is a deficient number, since it is larger than the sum of its proper divisors (101128444961).

204785100801 is an equidigital number, since it uses as much as digits as its factorization.

204785100801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2528211133 (or 2528211124 counting only the distinct ones).

The product of its (nonzero) digits is 17920, while the sum is 36.

The spelling of 204785100801 in words is "two hundred four billion, seven hundred eighty-five million, one hundred thousand, eight hundred one".