634891774609 has 16 divisors (see below), whose sum is σ = 679414049856. Its totient is φ = 591181504000.

The previous prime is 634891774597. The next prime is 634891774651. The reversal of 634891774609 is 906477198436.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-634891774609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (634891772609) 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, 1154934 + ... + 1613584.

It is an arithmetic number, because the mean of its divisors is an integer number (42463378116).

Almost surely, 2^634891774609 is an apocalyptic number.

It is an amenable number.

634891774609 is a deficient number, since it is larger than the sum of its proper divisors (44522275247).

634891774609 is a wasteful number, since it uses less digits than its factorization.

634891774609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 459536.

The product of its (nonzero) digits is 54867456, while the sum is 64.

The spelling of 634891774609 in words is "six hundred thirty-four billion, eight hundred ninety-one million, seven hundred seventy-four thousand, six hundred nine".