265808641 has 16 divisors (see below), whose sum is σ = 311721984. Its totient is φ = 221927184.

The previous prime is 265808597. The next prime is 265808687. The reversal of 265808641 is 146808562.

It is a cyclic number.

It is not a de Polignac number, because 265808641 - 2⁹ = 265808129 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 265808594 and 265808603.

It is not an unprimeable number, because it can be changed into a prime (265808041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 71556 + ... + 75178.

It is an arithmetic number, because the mean of its divisors is an integer number (19482624).

Almost surely, 2^265808641 is an apocalyptic number.

It is an amenable number.

265808641 is a deficient number, since it is larger than the sum of its proper divisors (45913343).

265808641 is a wasteful number, since it uses less digits than its factorization.

265808641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3900.

The product of its (nonzero) digits is 92160, while the sum is 40.

The square root of 265808641 is about 16303.6388882973. The cubic root of 265808641 is about 642.9685024322.

The spelling of 265808641 in words is "two hundred sixty-five million, eight hundred eight thousand, six hundred forty-one".