634223343436621 has 8 divisors (see below), whose sum is σ = 651460402746104. Its totient is φ = 616991330856960.

The previous prime is 634223343436601. The next prime is 634223343436643. The reversal of 634223343436621 is 126634343322436.

It can be written as a sum of positive squares in 4 ways, for example, as 41499814941225 + 592723528495396 = 6442035^2 + 24345914^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 634223343436621 - 2⁵ = 634223343436589 is a prime.

It is a super-2 number, since 2×634223343436621² (a number of 30 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 (634223343436601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1261427700 + ... + 1261930381.

It is an arithmetic number, because the mean of its divisors is an integer number (81432550343263).

Almost surely, 2^{634223343436621} is an apocalyptic number.

It is an amenable number.

634223343436621 is a deficient number, since it is larger than the sum of its proper divisors (17237059309483).

634223343436621 is a wasteful number, since it uses less digits than its factorization.

634223343436621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2523364911.

The product of its digits is 26873856, while the sum is 52.

The spelling of 634223343436621 in words is "six hundred thirty-four trillion, two hundred twenty-three billion, three hundred forty-three million, four hundred thirty-six thousand, six hundred twenty-one".