265535940650291 has 24 divisors (see below), whose sum is σ = 284650108703664. Its totient is φ = 247639886807040.

The previous prime is 265535940650203. The next prime is 265535940650333. The reversal of 265535940650291 is 192056049535562.

It is a happy number.

It is not a de Polignac number, because 265535940650291 - 2²² = 265535936455987 is a prime.

It is not an unprimeable number, because it can be changed into a prime (265535940652291) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 20268251 + ... + 30689963.

It is an arithmetic number, because the mean of its divisors is an integer number (11860421195986).

Almost surely, 2^{265535940650291} is an apocalyptic number.

265535940650291 is a deficient number, since it is larger than the sum of its proper divisors (19114168053373).

265535940650291 is a wasteful number, since it uses less digits than its factorization.

265535940650291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10422551 (or 10422534 counting only the distinct ones).

The product of its (nonzero) digits is 87480000, while the sum is 62.

The spelling of 265535940650291 in words is "two hundred sixty-five trillion, five hundred thirty-five billion, nine hundred forty million, six hundred fifty thousand, two hundred ninety-one".