634608670840 has 64 divisors (see below), whose sum is σ = 1503467827200. Its totient is φ = 240411719808.

The previous prime is 634608670811. The next prime is 634608670841. The reversal of 634608670840 is 48076806436.

It is a happy number.

It is a super-2 number, since 2×634608670840² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (634608670841) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2466777 + ... + 2711863.

It is an arithmetic number, because the mean of its divisors is an integer number (23491684800).

Almost surely, 2^634608670840 is an apocalyptic number.

It is an amenable number.

634608670840 is an abundant number, since it is smaller than the sum of its proper divisors (868859156360).

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

634608670840 is a wasteful number, since it uses less digits than its factorization.

634608670840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 248524 (or 248520 counting only the distinct ones).

The product of its (nonzero) digits is 4644864, while the sum is 52.

The spelling of 634608670840 in words is "six hundred thirty-four billion, six hundred eight million, six hundred seventy thousand, eight hundred forty".