634512450406 has 4 divisors (see below), whose sum is σ = 951768675612. Its totient is φ = 317256225202.

The previous prime is 634512450367. The next prime is 634512450419. The reversal of 634512450406 is 604054215436.

It is a semiprime because it is the product of two primes.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 158628112600 + ... + 158628112603.

It is an arithmetic number, because the mean of its divisors is an integer number (237942168903).

Almost surely, 2^634512450406 is an apocalyptic number.

634512450406 is a deficient number, since it is larger than the sum of its proper divisors (317256225206).

634512450406 is a wasteful number, since it uses less digits than its factorization.

634512450406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 317256225205.

The product of its (nonzero) digits is 345600, while the sum is 40.

The spelling of 634512450406 in words is "six hundred thirty-four billion, five hundred twelve million, four hundred fifty thousand, four hundred six".