638613480176 has 80 divisors (see below), whose sum is σ = 1425429600000. Its totient is φ = 271496669184.

The previous prime is 638613480101. The next prime is 638613480179. The reversal of 638613480176 is 671084316836.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (638613480179) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19428011 + ... + 19460853.

It is an arithmetic number, because the mean of its divisors is an integer number (17817870000).

Almost surely, 2^638613480176 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 638613480176, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (712714800000).

638613480176 is an abundant number, since it is smaller than the sum of its proper divisors (786816119824).

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

638613480176 is a wasteful number, since it uses less digits than its factorization.

638613480176 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34246 (or 34240 counting only the distinct ones).

The product of its (nonzero) digits is 3483648, while the sum is 53.

The spelling of 638613480176 in words is "six hundred thirty-eight billion, six hundred thirteen million, four hundred eighty thousand, one hundred seventy-six".