634345650 has 144 divisors (see below), whose sum is σ = 1824613128. Its totient is φ = 157440000.

The previous prime is 634345643. The next prime is 634345717. The reversal of 634345650 is 56543436.

634345650 is a `hidden beast` number, since 63 + 4 + 34 + 565 + 0 = 666.

It can be written as a sum of positive squares in 12 ways, for example, as 186896241 + 447449409 = 13671^2 + 21153^2 .

It is an alternating number because its digits alternate between even and odd.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 772240 + ... + 773060.

Almost surely, 2^634345650 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 634345650, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (912306564).

634345650 is an abundant number, since it is smaller than the sum of its proper divisors (1190267478).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

634345650 is a wasteful number, since it uses less digits than its factorization.

634345650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 957 (or 949 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 36.

The square root of 634345650 is about 25186.2194463560. The cubic root of 634345650 is about 859.2284634334.

The spelling of 634345650 in words is "six hundred thirty-four million, three hundred forty-five thousand, six hundred fifty".