634785255 has 48 divisors (see below), whose sum is σ = 1228849440. Its totient is φ = 312501888.

The previous prime is 634785241. The next prime is 634785301. The reversal of 634785255 is 552587436.

634785255 is a `hidden beast` number, since 634 + 7 + 8 + 5 + 2 + 5 + 5 = 666.

It is not a de Polignac number, because 634785255 - 2⁶ = 634785191 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 634785255.

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 47 ways as a sum of consecutive naturals, for example, 4300 + ... + 35889.

It is an arithmetic number, because the mean of its divisors is an integer number (25601030).

Almost surely, 2^634785255 is an apocalyptic number.

634785255 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

634785255 is a deficient number, since it is larger than the sum of its proper divisors (594064185).

634785255 is a wasteful number, since it uses less digits than its factorization.

634785255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40222 (or 40210 counting only the distinct ones).

The product of its digits is 1008000, while the sum is 45.

The square root of 634785255 is about 25194.9450287156. The cubic root of 634785255 is about 859.4269009404.

The spelling of 634785255 in words is "six hundred thirty-four million, seven hundred eighty-five thousand, two hundred fifty-five".