634693801677 has 8 divisors (see below), whose sum is σ = 911355202464. Its totient is φ = 390580801008.

The previous prime is 634693801673. The next prime is 634693801723. The reversal of 634693801677 is 776108396436.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 634693801677 - 2² = 634693801673 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 634693801677.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (634693801673) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8137099983 + ... + 8137100060.

It is an arithmetic number, because the mean of its divisors is an integer number (113919400308).

Almost surely, 2^634693801677 is an apocalyptic number.

It is an amenable number.

634693801677 is a deficient number, since it is larger than the sum of its proper divisors (276661400787).

634693801677 is a wasteful number, since it uses less digits than its factorization.

634693801677 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16274200059.

The product of its (nonzero) digits is 27433728, while the sum is 60.

The spelling of 634693801677 in words is "six hundred thirty-four billion, six hundred ninety-three million, eight hundred one thousand, six hundred seventy-seven".