265767062120561 has 4 divisors (see below), whose sum is σ = 266083828584000. Its totient is φ = 265450295657124.

The previous prime is 265767062120513. The next prime is 265767062120579. The reversal of 265767062120561 is 165021260767562.

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 265767062120561 - 2³⁴ = 265749882251377 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 265767062120497 and 265767062120506.

It is not an unprimeable number, because it can be changed into a prime (265767062123561) 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, 158383230461 + ... + 158383232138.

It is an arithmetic number, because the mean of its divisors is an integer number (66520957146000).

Almost surely, 2^{265767062120561} is an apocalyptic number.

It is an amenable number.

265767062120561 is a deficient number, since it is larger than the sum of its proper divisors (316766463439).

265767062120561 is an equidigital number, since it uses as much as digits as its factorization.

265767062120561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 316766463438.

The product of its (nonzero) digits is 12700800, while the sum is 56.

The spelling of 265767062120561 in words is "two hundred sixty-five trillion, seven hundred sixty-seven billion, sixty-two million, one hundred twenty thousand, five hundred sixty-one".