634685856207 has 16 divisors (see below), whose sum is σ = 940741982208. Its totient is φ = 377976687840.

The previous prime is 634685856199. The next prime is 634685856239. The reversal of 634685856207 is 702658586436.

It is not a de Polignac number, because 634685856207 - 2³ = 634685856199 is a prime.

It is a super-2 number, since 2×634685856207² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (634685856247) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 262482603 + ... + 262485020.

It is an arithmetic number, because the mean of its divisors is an integer number (58796373888).

Almost surely, 2^634685856207 is an apocalyptic number.

634685856207 is a deficient number, since it is larger than the sum of its proper divisors (306056126001).

634685856207 is a wasteful number, since it uses less digits than its factorization.

634685856207 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 524967670.

The product of its (nonzero) digits is 58060800, while the sum is 60.

The spelling of 634685856207 in words is "six hundred thirty-four billion, six hundred eighty-five million, eight hundred fifty-six thousand, two hundred seven".