265245502500421 has 4 divisors (see below), whose sum is σ = 265249358386144. Its totient is φ = 265241646614700.

The previous prime is 265245502500413. The next prime is 265245502500431. The reversal of 265245502500421 is 124005205542562.

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 a cyclic number.

It is not a de Polignac number, because 265245502500421 - 2³ = 265245502500413 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 (265245502500431) 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, 1927839675 + ... + 1927977256.

It is an arithmetic number, because the mean of its divisors is an integer number (66312339596536).

Almost surely, 2^{265245502500421} is an apocalyptic number.

It is an amenable number.

265245502500421 is a deficient number, since it is larger than the sum of its proper divisors (3855885723).

265245502500421 is an equidigital number, since it uses as much as digits as its factorization.

265245502500421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3855885722.

The product of its (nonzero) digits is 960000, while the sum is 43.

The spelling of 265245502500421 in words is "two hundred sixty-five trillion, two hundred forty-five billion, five hundred two million, five hundred thousand, four hundred twenty-one".