2638229755128 has 128 divisors (see below), whose sum is σ = 7444229184000. Its totient is φ = 771797573120.

The previous prime is 2638229755111. The next prime is 2638229755169. The reversal of 2638229755128 is 8215579228362.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 78434218 + ... + 78467846.

It is an arithmetic number, because the mean of its divisors is an integer number (58158040500).

Almost surely, 2^{2638229755128} 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 2638229755128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3722114592000).

2638229755128 is an abundant number, since it is smaller than the sum of its proper divisors (4805999428872).

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

2638229755128 is a wasteful number, since it uses less digits than its factorization.

2638229755128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43925 (or 43921 counting only the distinct ones).

The product of its digits is 29030400, while the sum is 60.

The spelling of 2638229755128 in words is "two trillion, six hundred thirty-eight billion, two hundred twenty-nine million, seven hundred fifty-five thousand, one hundred twenty-eight".