634631104066403 has 4 divisors (see below), whose sum is σ = 634632914612760. Its totient is φ = 634629293520048.

The previous prime is 634631104066391. The next prime is 634631104066457. The reversal of 634631104066403 is 304660401136436.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-634631104066403 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (634631104066103) 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, 904747298 + ... + 905448471.

It is an arithmetic number, because the mean of its divisors is an integer number (158658228653190).

Almost surely, 2^{634631104066403} is an apocalyptic number.

634631104066403 is a deficient number, since it is larger than the sum of its proper divisors (1810546357).

634631104066403 is a wasteful number, since it uses less digits than its factorization.

634631104066403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1810546356.

The product of its (nonzero) digits is 2239488, while the sum is 47.

The spelling of 634631104066403 in words is "six hundred thirty-four trillion, six hundred thirty-one billion, one hundred four million, sixty-six thousand, four hundred three".