263688053251 has 8 divisors (see below), whose sum is σ = 304988592384. Its totient is φ = 223295218440.

The previous prime is 263688053243. The next prime is 263688053323. The reversal of 263688053251 is 152350886362.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 263688053251 - 2³ = 263688053243 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 263688053195 and 263688053204.

It is not an unprimeable number, because it can be changed into a prime (263688053221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 226925455 + ... + 226926616.

It is an arithmetic number, because the mean of its divisors is an integer number (38123574048).

Almost surely, 2^263688053251 is an apocalyptic number.

263688053251 is a deficient number, since it is larger than the sum of its proper divisors (41300539133).

263688053251 is an equidigital number, since it uses as much as digits as its factorization.

263688053251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 453852161.

The product of its (nonzero) digits is 2073600, while the sum is 49.

The spelling of 263688053251 in words is "two hundred sixty-three billion, six hundred eighty-eight million, fifty-three thousand, two hundred fifty-one".