633670636381 has 16 divisors (see below), whose sum is σ = 641375660800. Its totient is φ = 625990809600.

The previous prime is 633670636363. The next prime is 633670636433. The reversal of 633670636381 is 183636076336.

It is a cyclic number.

It is not a de Polignac number, because 633670636381 - 2⁵ = 633670636349 is a prime.

It is a super-2 number, since 2×633670636381² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (633670636301) 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, 154589470 + ... + 154593568.

It is an arithmetic number, because the mean of its divisors is an integer number (40085978800).

Almost surely, 2^633670636381 is an apocalyptic number.

It is an amenable number.

633670636381 is a deficient number, since it is larger than the sum of its proper divisors (7705024419).

633670636381 is a wasteful number, since it uses less digits than its factorization.

633670636381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6724.

The product of its (nonzero) digits is 5878656, while the sum is 52.

The spelling of 633670636381 in words is "six hundred thirty-three billion, six hundred seventy million, six hundred thirty-six thousand, three hundred eighty-one".