634703667647 has 16 divisors (see below), whose sum is σ = 739190836800. Its totient is φ = 533673883392.

The previous prime is 634703667641. The next prime is 634703667677. The reversal of 634703667647 is 746766307436.

It is a cyclic number.

It is not a de Polignac number, because 634703667647 - 2⁸ = 634703667391 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (634703667641) 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, 2023733 + ... + 2316225.

It is an arithmetic number, because the mean of its divisors is an integer number (46199427300).

Almost surely, 2^634703667647 is an apocalyptic number.

634703667647 is a deficient number, since it is larger than the sum of its proper divisors (104487169153).

634703667647 is a wasteful number, since it uses less digits than its factorization.

634703667647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 298402.

The product of its (nonzero) digits is 64012032, while the sum is 59.

The spelling of 634703667647 in words is "six hundred thirty-four billion, seven hundred three million, six hundred sixty-seven thousand, six hundred forty-seven".