263453664 has 24 divisors (see below), whose sum is σ = 691566120. Its totient is φ = 87817856.

The previous prime is 263453651. The next prime is 263453681. The reversal of 263453664 is 466354362.

It is a tau number, because it is divible by the number of its divisors (24).

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 1372059 + ... + 1372250.

It is an arithmetic number, because the mean of its divisors is an integer number (28815255).

Almost surely, 2^263453664 is an apocalyptic number.

263453664 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

263453664 is an abundant number, since it is smaller than the sum of its proper divisors (428112456).

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

263453664 is a wasteful number, since it uses less digits than its factorization.

263453664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2744322 (or 2744314 counting only the distinct ones).

The product of its digits is 311040, while the sum is 39.

The square root of 263453664 is about 16231.2557739689. The cubic root of 263453664 is about 641.0640372873.

The spelling of 263453664 in words is "two hundred sixty-three million, four hundred fifty-three thousand, six hundred sixty-four".