633226851081 has 18 divisors (see below), whose sum is σ = 1005371191370. Its totient is φ = 383773848480.

The previous prime is 633226851079. The next prime is 633226851107. The reversal of 633226851081 is 180158622336.

633226851081 is a `hidden beast` number, since 6 + 3 + 32 + 26 + 8 + 510 + 81 = 666.

633226851081 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 446999216400 + 186227634681 = 668580^2 + 431541^2 .

It is not a de Polignac number, because 633226851081 - 2¹ = 633226851079 is a prime.

It is a super-2 number, since 2×633226851081² (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 (633226851281) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 290736676 + ... + 290738853.

Almost surely, 2^633226851081 is an apocalyptic number.

It is an amenable number.

633226851081 is a deficient number, since it is larger than the sum of its proper divisors (372144340289).

633226851081 is a wasteful number, since it uses less digits than its factorization.

633226851081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 581475557 (or 581475543 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 45.

The spelling of 633226851081 in words is "six hundred thirty-three billion, two hundred twenty-six million, eight hundred fifty-one thousand, eighty-one".