265233997287 has 16 divisors (see below), whose sum is σ = 449073434880. Its totient is φ = 151562284056.

The previous prime is 265233997271. The next prime is 265233997291. The reversal of 265233997287 is 782799332562.

265233997287 is a `hidden beast` number, since 2 + 6 + 523 + 39 + 9 + 72 + 8 + 7 = 666.

It is not a de Polignac number, because 265233997287 - 2⁴ = 265233997271 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (265233993287) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 701677053 + ... + 701677430.

It is an arithmetic number, because the mean of its divisors is an integer number (28067089680).

Almost surely, 2^265233997287 is an apocalyptic number.

265233997287 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

265233997287 is a deficient number, since it is larger than the sum of its proper divisors (183839437593).

265233997287 is a wasteful number, since it uses less digits than its factorization.

265233997287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1403354499 (or 1403354493 counting only the distinct ones).

The product of its digits is 68584320, while the sum is 63.

The spelling of 265233997287 in words is "two hundred sixty-five billion, two hundred thirty-three million, nine hundred ninety-seven thousand, two hundred eighty-seven".