263421342336 has 64 divisors (see below), whose sum is σ = 722284358400. Its totient is φ = 84974622720.

The previous prime is 263421342329. The next prime is 263421342421. The reversal of 263421342336 is 633243124362.

It is a tau number, because it is divible by the number of its divisors (64).

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

It is a junction number, because it is equal to n+sod(n) for n = 263421342294 and 263421342303.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11052501 + ... + 11076308.

It is an arithmetic number, because the mean of its divisors is an integer number (11285693100).

Almost surely, 2^263421342336 is an apocalyptic number.

It is an amenable number.

263421342336 is an abundant number, since it is smaller than the sum of its proper divisors (458863016064).

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

263421342336 is a wasteful number, since it uses less digits than its factorization.

263421342336 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22128857 (or 22128845 counting only the distinct ones).

The product of its digits is 373248, while the sum is 39.

Adding to 263421342336 its reverse (633243124362), we get a palindrome (896664466698).

The spelling of 263421342336 in words is "two hundred sixty-three billion, four hundred twenty-one million, three hundred forty-two thousand, three hundred thirty-six".