2056006805658 has 128 divisors (see below), whose sum is σ = 4782799526400. Its totient is φ = 583928497152.

The previous prime is 2056006805603. The next prime is 2056006805683. The reversal of 2056006805658 is 8565086006502.

It is a self number, because there is not a number n which added to its sum of digits gives 2056006805658.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 105551016 + ... + 105570492.

It is an arithmetic number, because the mean of its divisors is an integer number (37365621300).

Almost surely, 2^{2056006805658} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2056006805658, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2391399763200).

2056006805658 is an abundant number, since it is smaller than the sum of its proper divisors (2726792720742).

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

2056006805658 is a wasteful number, since it uses less digits than its factorization.

2056006805658 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21576.

The product of its (nonzero) digits is 3456000, while the sum is 51.

The spelling of 2056006805658 in words is "two trillion, fifty-six billion, six million, eight hundred five thousand, six hundred fifty-eight".