634735812080 has 20 divisors (see below), whose sum is σ = 1475760763272. Its totient is φ = 253894324800.

The previous prime is 634735812047. The next prime is 634735812089. The reversal of 634735812080 is 80218537436.

It is a tau number, because it is divible by the number of its divisors (20).

It is a super-2 number, since 2×634735812080² (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 (634735812089) 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, 3967098746 + ... + 3967098905.

Almost surely, 2^634735812080 is an apocalyptic number.

It is an amenable number.

634735812080 is an abundant number, since it is smaller than the sum of its proper divisors (841024951192).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

634735812080 is a wasteful number, since it uses less digits than its factorization.

634735812080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7934197664 (or 7934197658 counting only the distinct ones).

The product of its (nonzero) digits is 967680, while the sum is 47.

The spelling of 634735812080 in words is "six hundred thirty-four billion, seven hundred thirty-five million, eight hundred twelve thousand, eighty".