634757579877 has 4 divisors (see below), whose sum is σ = 846343439840. Its totient is φ = 423171719916.

The previous prime is 634757579851. The next prime is 634757579921. The reversal of 634757579877 is 778975757436.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 634757579877 - 2¹⁶ = 634757514341 is a prime.

It is a super-2 number, since 2×634757579877² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 634757579799 and 634757579808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (634757579837) 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, 105792929977 + ... + 105792929982.

It is an arithmetic number, because the mean of its divisors is an integer number (211585859960).

Almost surely, 2^634757579877 is an apocalyptic number.

It is an amenable number.

634757579877 is a deficient number, since it is larger than the sum of its proper divisors (211585859963).

634757579877 is a wasteful number, since it uses less digits than its factorization.

634757579877 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211585859962.

The product of its digits is 2178187200, while the sum is 75.

The spelling of 634757579877 in words is "six hundred thirty-four billion, seven hundred fifty-seven million, five hundred seventy-nine thousand, eight hundred seventy-seven".