289505901601 has 4 divisors (see below), whose sum is σ = 330863887552. Its totient is φ = 248147915652.

The previous prime is 289505901583. The next prime is 289505901631. The reversal of 289505901601 is 106109505982.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 289505901601 - 2⁵ = 289505901569 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (289505901631) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20678992965 + ... + 20678992978.

It is an arithmetic number, because the mean of its divisors is an integer number (82715971888).

Almost surely, 2^289505901601 is an apocalyptic number.

It is an amenable number.

289505901601 is a deficient number, since it is larger than the sum of its proper divisors (41357985951).

289505901601 is an equidigital number, since it uses as much as digits as its factorization.

289505901601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41357985950.

The product of its (nonzero) digits is 194400, while the sum is 46.

The spelling of 289505901601 in words is "two hundred eighty-nine billion, five hundred five million, nine hundred one thousand, six hundred one".