204045788173 has 2 divisors, whose sum is σ = 204045788174. Its totient is φ = 204045788172.

The previous prime is 204045788153. The next prime is 204045788183. The reversal of 204045788173 is 371887540402.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 108532031364 + 95513756809 = 329442^2 + 309053^2 .

It is a cyclic number.

It is not a de Polignac number, because 204045788173 - 2⁹ = 204045787661 is a prime.

It is a super-2 number, since 2×204045788173² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (204045788153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102022894086 + 102022894087.

It is an arithmetic number, because the mean of its divisors is an integer number (102022894087).

Almost surely, 2^204045788173 is an apocalyptic number.

It is an amenable number.

204045788173 is a deficient number, since it is larger than the sum of its proper divisors (1).

204045788173 is an equidigital number, since it uses as much as digits as its factorization.

204045788173 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1505280, while the sum is 49.

The spelling of 204045788173 in words is "two hundred four billion, forty-five million, seven hundred eighty-eight thousand, one hundred seventy-three".