634439062663 has 4 divisors (see below), whose sum is σ = 725073214480. Its totient is φ = 543804910848.

The previous prime is 634439062643. The next prime is 634439062693. The reversal of 634439062663 is 366260934436.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 634439062663 - 2⁹ = 634439062151 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 634439062663.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (634439062643) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45317075898 + ... + 45317075911.

It is an arithmetic number, because the mean of its divisors is an integer number (181268303620).

Almost surely, 2^634439062663 is an apocalyptic number.

634439062663 is a deficient number, since it is larger than the sum of its proper divisors (90634151817).

634439062663 is an equidigital number, since it uses as much as digits as its factorization.

634439062663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90634151816.

The product of its (nonzero) digits is 10077696, while the sum is 52.

The spelling of 634439062663 in words is "six hundred thirty-four billion, four hundred thirty-nine million, sixty-two thousand, six hundred sixty-three".