634447534478 has 16 divisors (see below), whose sum is σ = 967942485360. Its totient is φ = 311801607936.

The previous prime is 634447534459. The next prime is 634447534549. The reversal of 634447534478 is 874435744436.

It is a Harshad number since it is a multiple of its sum of digits (59).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 427550 + ... + 1204862.

It is an arithmetic number, because the mean of its divisors is an integer number (60496405335).

Almost surely, 2^634447534478 is an apocalyptic number.

634447534478 is a deficient number, since it is larger than the sum of its proper divisors (333494950882).

634447534478 is a wasteful number, since it uses less digits than its factorization.

634447534478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 784291.

The product of its digits is 108380160, while the sum is 59.

The spelling of 634447534478 in words is "six hundred thirty-four billion, four hundred forty-seven million, five hundred thirty-four thousand, four hundred seventy-eight".