634486251 has 24 divisors (see below), whose sum is σ = 995178960. Its totient is φ = 358482432.

The previous prime is 634486241. The next prime is 634486277. The reversal of 634486251 is 152684436.

It is not a de Polignac number, because 634486251 - 2⁶ = 634486187 is a prime.

It is not an unprimeable number, because it can be changed into a prime (634486241) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 11166 + ... + 37331.

It is an arithmetic number, because the mean of its divisors is an integer number (41465790).

Almost surely, 2^634486251 is an apocalyptic number.

634486251 is a deficient number, since it is larger than the sum of its proper divisors (360692709).

634486251 is a wasteful number, since it uses less digits than its factorization.

634486251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48603 (or 48596 counting only the distinct ones).

The product of its digits is 138240, while the sum is 39.

The square root of 634486251 is about 25189.0105204631. The cubic root of 634486251 is about 859.2919406332.

The spelling of 634486251 in words is "six hundred thirty-four million, four hundred eighty-six thousand, two hundred fifty-one".