265624563 has 8 divisors (see below), whose sum is σ = 354790800. Its totient is φ = 176770688.

The previous prime is 265624511. The next prime is 265624573. The reversal of 265624563 is 365426562.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 265624563 - 2²⁶ = 198515699 is a prime.

It is not an unprimeable number, because it can be changed into a prime (265624573) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 76098 + ... + 79511.

It is an arithmetic number, because the mean of its divisors is an integer number (44348850).

Almost surely, 2^265624563 is an apocalyptic number.

265624563 is a deficient number, since it is larger than the sum of its proper divisors (89166237).

265624563 is a wasteful number, since it uses less digits than its factorization.

265624563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156181.

The product of its digits is 259200, while the sum is 39.

The square root of 265624563 is about 16297.9926064531. The cubic root of 265624563 is about 642.8200451467.

It can be divided in two parts, 26562 and 4563, that added together give a triangular number (31125 = T₂₄₉).

The spelling of 265624563 in words is "two hundred sixty-five million, six hundred twenty-four thousand, five hundred sixty-three".