634267295281 has 3 divisors (see below), whose sum is σ = 634268091691. Its totient is φ = 634266498872.

The previous prime is 634267295267. The next prime is 634267295341. The reversal of 634267295281 is 182592762436.

It is a happy number.

The square root of 634267295281 is 796409.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 20175645681 + 614091649600 = 142041^2 + 783640^2 .

It is not a de Polignac number, because 634267295281 - 2¹⁹ = 634266770993 is a prime.

It is a super-2 number, since 2×634267295281² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (634267295231) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 398205 + ... + 1194613.

Almost surely, 2^634267295281 is an apocalyptic number.

634267295281 is the 796409-th square number.

634267295281 is the 398205-th centered octagonal number.

It is an amenable number.

634267295281 is a deficient number, since it is larger than the sum of its proper divisors (796410).

634267295281 is an frugal number, since it uses more digits than its factorization.

634267295281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1592818 (or 796409 counting only the distinct ones).

The product of its digits is 8709120, while the sum is 55.

The spelling of 634267295281 in words is "six hundred thirty-four billion, two hundred sixty-seven million, two hundred ninety-five thousand, two hundred eighty-one".