263196864 has 140 divisors (see below), whose sum is σ = 891777744. Its totient is φ = 75188736.

The previous prime is 263196859. The next prime is 263196881. The reversal of 263196864 is 468691362.

263196864 is a `hidden beast` number, since 2 + 631 + 9 + 6 + 8 + 6 + 4 = 666.

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 32662 + ... + 39914.

Almost surely, 2^263196864 is an apocalyptic number.

263196864 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 263196864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (445888872).

263196864 is an abundant number, since it is smaller than the sum of its proper divisors (628580880).

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

263196864 is an equidigital number, since it uses as much as digits as its factorization.

263196864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7284 (or 7265 counting only the distinct ones).

The product of its digits is 373248, while the sum is 45.

The square root of 263196864 is about 16223.3431819708. The cubic root of 263196864 is about 640.8556783670.

The spelling of 263196864 in words is "two hundred sixty-three million, one hundred ninety-six thousand, eight hundred sixty-four".