634857860407 has 2 divisors, whose sum is σ = 634857860408. Its totient is φ = 634857860406.

The previous prime is 634857860393. The next prime is 634857860467. The reversal of 634857860407 is 704068758436.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 634857860407 - 2¹¹ = 634857858359 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (634857860467) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 317428930203 + 317428930204.

It is an arithmetic number, because the mean of its divisors is an integer number (317428930204).

Almost surely, 2^634857860407 is an apocalyptic number.

634857860407 is a deficient number, since it is larger than the sum of its proper divisors (1).

634857860407 is an equidigital number, since it uses as much as digits as its factorization.

634857860407 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27095040, while the sum is 58.

The spelling of 634857860407 in words is "six hundred thirty-four billion, eight hundred fifty-seven million, eight hundred sixty thousand, four hundred seven".