634090445647 has 4 divisors (see below), whose sum is σ = 634446078640. Its totient is φ = 633734812656.

The previous prime is 634090445627. The next prime is 634090445663. The reversal of 634090445647 is 746544090436.

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 634090445647 - 2⁷ = 634090445519 is a prime.

It is a super-2 number, since 2×634090445647² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 634090445594 and 634090445603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (634090445627) 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, 177813822 + ... + 177817387.

It is an arithmetic number, because the mean of its divisors is an integer number (158611519660).

Almost surely, 2^634090445647 is an apocalyptic number.

634090445647 is a deficient number, since it is larger than the sum of its proper divisors (355632993).

634090445647 is a wasteful number, since it uses less digits than its factorization.

634090445647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 355632992.

The product of its (nonzero) digits is 8709120, while the sum is 52.

The spelling of 634090445647 in words is "six hundred thirty-four billion, ninety million, four hundred forty-five thousand, six hundred forty-seven".