204026251091 has 8 divisors (see below), whose sum is σ = 224830359600. Its totient is φ = 183952111392.

The previous prime is 204026251069. The next prime is 204026251097. The reversal of 204026251091 is 190152620402.

204026251091 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-204026251091 is a prime.

It is a super-2 number, since 2×204026251091² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (204026251097) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 182491616 + ... + 182492733.

It is an arithmetic number, because the mean of its divisors is an integer number (28103794950).

Almost surely, 2^204026251091 is an apocalyptic number.

204026251091 is a deficient number, since it is larger than the sum of its proper divisors (20804108509).

204026251091 is a wasteful number, since it uses less digits than its factorization.

204026251091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 364984405.

The product of its (nonzero) digits is 8640, while the sum is 32.

Adding to 204026251091 its reverse (190152620402), we get a palindrome (394178871493).

The spelling of 204026251091 in words is "two hundred four billion, twenty-six million, two hundred fifty-one thousand, ninety-one".