634616161 has 8 divisors (see below), whose sum is σ = 672093504. Its totient is φ = 597962640.

The previous prime is 634616113. The next prime is 634616167. The reversal of 634616161 is 161616436.

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 634616161 - 2¹⁵ = 634583393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (634616167) 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, 204370 + ... + 207451.

It is an arithmetic number, because the mean of its divisors is an integer number (84011688).

Almost surely, 2^634616161 is an apocalyptic number.

It is an amenable number.

634616161 is a deficient number, since it is larger than the sum of its proper divisors (37477343).

634616161 is a wasteful number, since it uses less digits than its factorization.

634616161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 411911.

The product of its digits is 15552, while the sum is 34.

The square root of 634616161 is about 25191.5890923935. The cubic root of 634616161 is about 859.3505828276.

The spelling of 634616161 in words is "six hundred thirty-four million, six hundred sixteen thousand, one hundred sixty-one".