263434940000 has 120 divisors (see below), whose sum is σ = 649102508208. Its totient is φ = 105209280000.

The previous prime is 263434939961. The next prime is 263434940009. The reversal of 263434940000 is 49434362.

It is a super-2 number, since 2×263434940000² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (263434940009) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 13210037 + ... + 13229963.

Almost surely, 2^263434940000 is an apocalyptic number.

263434940000 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 263434940000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (324551254104).

263434940000 is an abundant number, since it is smaller than the sum of its proper divisors (385667568208).

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

263434940000 is an equidigital number, since it uses as much as digits as its factorization.

263434940000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20618 (or 20595 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 35.

The spelling of 263434940000 in words is "two hundred sixty-three billion, four hundred thirty-four million, nine hundred forty thousand".