20615591126328 has 384 divisors, whose sum is σ = 62381702880000. Its totient is φ = 5650026117120.

The previous prime is 20615591126279. The next prime is 20615591126369. The reversal of 20615591126328 is 82362119551602.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 142336875 + ... + 142481637.

It is an arithmetic number, because the mean of its divisors is an integer number (162452351250).

Almost surely, 2^{20615591126328} 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 20615591126328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31190851440000).

20615591126328 is an abundant number, since it is smaller than the sum of its proper divisors (41766111753672).

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

20615591126328 is a wasteful number, since it uses less digits than its factorization.

20615591126328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144931 (or 144916 counting only the distinct ones).

The product of its (nonzero) digits is 1555200, while the sum is 51.

The spelling of 20615591126328 in words is "twenty trillion, six hundred fifteen billion, five hundred ninety-one million, one hundred twenty-six thousand, three hundred twenty-eight".