634135556 has 6 divisors (see below), whose sum is σ = 1109737230. Its totient is φ = 317067776.

The previous prime is 634135549. The next prime is 634135559. The reversal of 634135556 is 655531436.

It can be written as a sum of positive squares in only one way, i.e., 478734400 + 155401156 = 21880^2 + 12466^2 .

It is not an unprimeable number, because it can be changed into a prime (634135559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 79266941 + ... + 79266948.

It is an arithmetic number, because the mean of its divisors is an integer number (184956205).

Almost surely, 2^634135556 is an apocalyptic number.

It is an amenable number.

634135556 is a deficient number, since it is larger than the sum of its proper divisors (475601674).

634135556 is a wasteful number, since it uses less digits than its factorization.

634135556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158533893 (or 158533891 counting only the distinct ones).

The product of its digits is 162000, while the sum is 38.

The square root of 634135556 is about 25182.0482884137. The cubic root of 634135556 is about 859.1335947145.

The spelling of 634135556 in words is "six hundred thirty-four million, one hundred thirty-five thousand, five hundred fifty-six".