634051271205 has 64 divisors (see below), whose sum is σ = 1241167795200. Its totient is φ = 304545648960.

The previous prime is 634051271201. The next prime is 634051271207. The reversal of 634051271205 is 502172150436.

634051271205 is a `hidden beast` number, since 6 + 3 + 405 + 127 + 120 + 5 = 666.

It is not a de Polignac number, because 634051271205 - 2² = 634051271201 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 634051271205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (634051271201) by changing a digit.

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 63 ways as a sum of consecutive naturals, for example, 1836295 + ... + 2154084.

It is an arithmetic number, because the mean of its divisors is an integer number (19393246800).

Almost surely, 2^634051271205 is an apocalyptic number.

It is an amenable number.

634051271205 is a deficient number, since it is larger than the sum of its proper divisors (607116523995).

634051271205 is a wasteful number, since it uses less digits than its factorization.

634051271205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3990511 (or 3990505 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 36.

The spelling of 634051271205 in words is "six hundred thirty-four billion, fifty-one million, two hundred seventy-one thousand, two hundred five".