263994889000 has 128 divisors (see below), whose sum is σ = 635015066400. Its totient is φ = 102651494400.

The previous prime is 263994888959. The next prime is 263994889001. The reversal of 263994889000 is 988499362.

It can be written as a sum of positive squares in 16 ways, for example, as 26749910916 + 237244978084 = 163554^2 + 487078^2 .

It is a hoax number, since the sum of its digits (58) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (263994889001) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 52870504 + ... + 52875496.

Almost surely, 2^263994889000 is an apocalyptic number.

263994889000 is a gapful number since it is divisible by the number (20) 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 263994889000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (317507533200).

263994889000 is an abundant number, since it is smaller than the sum of its proper divisors (371020177400).

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

263994889000 is a wasteful number, since it uses less digits than its factorization.

263994889000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6480 (or 6466 counting only the distinct ones).

The product of its (nonzero) digits is 6718464, while the sum is 58.

The spelling of 263994889000 in words is "two hundred sixty-three billion, nine hundred ninety-four million, eight hundred eighty-nine thousand".