263505260431 has 16 divisors (see below), whose sum is σ = 302119324416. Its totient is φ = 225134859456.

The previous prime is 263505260401. The next prime is 263505260477. The reversal of 263505260431 is 134062505362.

It is a cyclic number.

It is not a de Polignac number, because 263505260431 - 2¹³ = 263505252239 is a prime.

It is a super-2 number, since 2×263505260431² (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 (263505260401) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3020040 + ... + 3106066.

It is an arithmetic number, because the mean of its divisors is an integer number (18882457776).

Almost surely, 2^263505260431 is an apocalyptic number.

263505260431 is a deficient number, since it is larger than the sum of its proper divisors (38614063985).

263505260431 is an equidigital number, since it uses as much as digits as its factorization.

263505260431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87438.

The product of its (nonzero) digits is 129600, while the sum is 37.

Adding to 263505260431 its reverse (134062505362), we get a palindrome (397567765793).

The spelling of 263505260431 in words is "two hundred sixty-three billion, five hundred five million, two hundred sixty thousand, four hundred thirty-one".