265026452006221 has 4 divisors (see below), whose sum is σ = 270026951100732. Its totient is φ = 260025952911712.

The previous prime is 265026452006149. The next prime is 265026452006227. The reversal of 265026452006221 is 122600254620562.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 110842700450596 + 154183751555625 = 10528186^2 + 12417075^2 .

It is a cyclic number.

It is not a de Polignac number, because 265026452006221 - 2¹¹ = 265026452004173 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (265026452006227) 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, 2500249547176 + ... + 2500249547281.

It is an arithmetic number, because the mean of its divisors is an integer number (67506737775183).

Almost surely, 2^{265026452006221} is an apocalyptic number.

It is an amenable number.

265026452006221 is a deficient number, since it is larger than the sum of its proper divisors (5000499094511).

265026452006221 is an equidigital number, since it uses as much as digits as its factorization.

265026452006221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5000499094510.

The product of its (nonzero) digits is 691200, while the sum is 43.

The spelling of 265026452006221 in words is "two hundred sixty-five trillion, twenty-six billion, four hundred fifty-two million, six thousand, two hundred twenty-one".