634338147620 has 24 divisors (see below), whose sum is σ = 1368113087544. Its totient is φ = 246877549056.

The previous prime is 634338147581. The next prime is 634338147631. The reversal of 634338147620 is 26741833436.

It can be written as a sum of positive squares in 4 ways, for example, as 44056330816 + 590281816804 = 209896^2 + 768298^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 428606117 + ... + 428607596.

It is an arithmetic number, because the mean of its divisors is an integer number (57004711981).

Almost surely, 2^634338147620 is an apocalyptic number.

It is an amenable number.

634338147620 is an abundant number, since it is smaller than the sum of its proper divisors (733774939924).

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

634338147620 is a wasteful number, since it uses less digits than its factorization.

634338147620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 857213759 (or 857213757 counting only the distinct ones).

The product of its (nonzero) digits is 1741824, while the sum is 47.

The spelling of 634338147620 in words is "six hundred thirty-four billion, three hundred thirty-eight million, one hundred forty-seven thousand, six hundred twenty".