634438576168667 has 8 divisors (see below), whose sum is σ = 640074890018256. Its totient is φ = 628802645006592.

The previous prime is 634438576168591. The next prime is 634438576168673. The reversal of 634438576168667 is 766861675834436.

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 634438576168667 - 2¹² = 634438576164571 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 634438576168591 and 634438576168600.

It is not an unprimeable number, because it can be changed into a prime (634438576198667) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 92340938 + ... + 98973359.

It is an arithmetic number, because the mean of its divisors is an integer number (80009361252282).

Almost surely, 2^{634438576168667} is an apocalyptic number.

634438576168667 is a deficient number, since it is larger than the sum of its proper divisors (5636313849589).

634438576168667 is a wasteful number, since it uses less digits than its factorization.

634438576168667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191343757.

The product of its digits is 17557585920, while the sum is 80.

The spelling of 634438576168667 in words is "six hundred thirty-four trillion, four hundred thirty-eight billion, five hundred seventy-six million, one hundred sixty-eight thousand, six hundred sixty-seven".