634363211313263 has 4 divisors (see below), whose sum is σ = 634390149347400. Its totient is φ = 634336273279128.

The previous prime is 634363211313239. The next prime is 634363211313281. The reversal of 634363211313263 is 362313112363436.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 634363211313263 - 2¹² = 634363211309167 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (634363211313163) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13468981745 + ... + 13469028842.

It is an arithmetic number, because the mean of its divisors is an integer number (158597537336850).

Almost surely, 2^{634363211313263} is an apocalyptic number.

634363211313263 is a deficient number, since it is larger than the sum of its proper divisors (26938034137).

634363211313263 is a wasteful number, since it uses less digits than its factorization.

634363211313263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26938034136.

The product of its digits is 2519424, while the sum is 47.

Adding to 634363211313263 its reverse (362313112363436), we get a palindrome (996676323676699).

The spelling of 634363211313263 in words is "six hundred thirty-four trillion, three hundred sixty-three billion, two hundred eleven million, three hundred thirteen thousand, two hundred sixty-three".