634434402432556 has 144 divisors (see below), whose sum is σ = 1235726099125056. Its totient is φ = 284766412480000.

The previous prime is 634434402432529. The next prime is 634434402432629. The reversal of 634434402432556 is 655234204434436.

It is a Smith number, since the sum of its digits (55) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 634434402432497 and 634434402432506.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 29761888410 + ... + 29761909726.

It is an arithmetic number, because the mean of its divisors is an integer number (8581431243924).

Almost surely, 2^{634434402432556} is an apocalyptic number.

It is an amenable number.

634434402432556 is a deficient number, since it is larger than the sum of its proper divisors (601291696692500).

634434402432556 is a wasteful number, since it uses less digits than its factorization.

634434402432556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23032 (or 23019 counting only the distinct ones).

The product of its (nonzero) digits is 99532800, while the sum is 55.

The spelling of 634434402432556 in words is "six hundred thirty-four trillion, four hundred thirty-four billion, four hundred two million, four hundred thirty-two thousand, five hundred fifty-six".