634090561 has 8 divisors (see below), whose sum is σ = 683190144. Its totient is φ = 585037200.

The previous prime is 634090549. The next prime is 634090579. The reversal of 634090561 is 165090436.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 634090561 - 2⁵ = 634090529 is a prime.

It is not an unprimeable number, because it can be changed into a prime (634010561) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20190 + ... + 40936.

It is an arithmetic number, because the mean of its divisors is an integer number (85398768).

Almost surely, 2^634090561 is an apocalyptic number.

It is an amenable number.

634090561 is a deficient number, since it is larger than the sum of its proper divisors (49099583).

634090561 is a wasteful number, since it uses less digits than its factorization.

634090561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23111.

The product of its (nonzero) digits is 19440, while the sum is 34.

The square root of 634090561 is about 25181.1548782021. The cubic root of 634090561 is about 859.1132743323.

The spelling of 634090561 in words is "six hundred thirty-four million, ninety thousand, five hundred sixty-one".