263996145 has 64 divisors (see below), whose sum is σ = 567959040. Its totient is φ = 113577984.

The previous prime is 263996143. The next prime is 263996153. The reversal of 263996145 is 541699362.

263996145 is a `hidden beast` number, since 2 + 639 + 9 + 6 + 1 + 4 + 5 = 666.

It is not a de Polignac number, because 263996145 - 2¹ = 263996143 is a prime.

It is a super-2 number, since 2×263996145² = 139387929149722050, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 263996145.

It is not an unprimeable number, because it can be changed into a prime (263996143) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 7849 + ... + 24281.

It is an arithmetic number, because the mean of its divisors is an integer number (8874360).

Almost surely, 2^263996145 is an apocalyptic number.

It is an amenable number.

263996145 is an abundant number, since it is smaller than the sum of its proper divisors (303962895).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

263996145 is a wasteful number, since it uses less digits than its factorization.

263996145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16471 (or 16465 counting only the distinct ones).

The product of its digits is 349920, while the sum is 45.

The square root of 263996145 is about 16247.9581794144. The cubic root of 263996145 is about 641.5037434979.

The spelling of 263996145 in words is "two hundred sixty-three million, nine hundred ninety-six thousand, one hundred forty-five".