634071251117 has 4 divisors (see below), whose sum is σ = 651208311996. Its totient is φ = 616934190240.

The previous prime is 634071251111. The next prime is 634071251119. The reversal of 634071251117 is 711152170436.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 274774107721 + 359297143396 = 524189^2 + 599414^2 .

It is a cyclic number.

It is not a de Polignac number, because 634071251117 - 2⁸ = 634071250861 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (634071251111) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8568530384 + ... + 8568530457.

It is an arithmetic number, because the mean of its divisors is an integer number (162802077999).

Almost surely, 2^634071251117 is an apocalyptic number.

It is an amenable number.

634071251117 is a deficient number, since it is larger than the sum of its proper divisors (17137060879).

634071251117 is a wasteful number, since it uses less digits than its factorization.

634071251117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17137060878.

The product of its (nonzero) digits is 35280, while the sum is 38.

The spelling of 634071251117 in words is "six hundred thirty-four billion, seventy-one million, two hundred fifty-one thousand, one hundred seventeen".