265134450055621 has 32 divisors (see below), whose sum is σ = 279166880918016. Its totient is φ = 251319594240000.

The previous prime is 265134450055619. The next prime is 265134450055627. The reversal of 265134450055621 is 126550054431562.

It is not a de Polignac number, because 265134450055621 - 2¹ = 265134450055619 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 (265134450055627) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10991839441 + ... + 10991863561.

It is an arithmetic number, because the mean of its divisors is an integer number (8723965028688).

Almost surely, 2^{265134450055621} is an apocalyptic number.

It is an amenable number.

265134450055621 is a deficient number, since it is larger than the sum of its proper divisors (14032430862395).

265134450055621 is a wasteful number, since it uses less digits than its factorization.

265134450055621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32293.

The product of its (nonzero) digits is 4320000, while the sum is 49.

The spelling of 265134450055621 in words is "two hundred sixty-five trillion, one hundred thirty-four billion, four hundred fifty million, fifty-five thousand, six hundred twenty-one".