633362897281 has 9 divisors (see below), whose sum is σ = 634789862721. Its totient is φ = 631939137732.

The previous prime is 633362897267. The next prime is 633362897333. The reversal of 633362897281 is 182798263336.

The square root of 633362897281 is 795841.

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

It is not a de Polignac number, because 633362897281 - 2⁵ = 633362897249 is a prime.

It is a super-2 number, since 2×633362897281² (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 (633362897681) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 654976660 + ... + 654977626.

It is an arithmetic number, because the mean of its divisors is an integer number (70532206969).

Almost surely, 2^633362897281 is an apocalyptic number.

633362897281 is the 795841-st square number.

633362897281 is the 397921-st centered octagonal number.

It is an amenable number.

633362897281 is a deficient number, since it is larger than the sum of its proper divisors (1426965440).

633362897281 is an frugal number, since it uses more digits than its factorization.

633362897281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3580 (or 1790 counting only the distinct ones).

The product of its digits is 15676416, while the sum is 58.

The spelling of 633362897281 in words is "six hundred thirty-three billion, three hundred sixty-two million, eight hundred ninety-seven thousand, two hundred eighty-one".