2105158555830 has 128 divisors (see below), whose sum is σ = 5649980345856. Its totient is φ = 497553638400.

The previous prime is 2105158555823. The next prime is 2105158555853. The reversal of 2105158555830 is 385558515012.

It is a self number, because there is not a number n which added to its sum of digits gives 2105158555830.

It is a congruent number.

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, 20012532 + ... + 20117448.

It is an arithmetic number, because the mean of its divisors is an integer number (44140471452).

Almost surely, 2^{2105158555830} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2105158555830, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2824990172928).

2105158555830 is an abundant number, since it is smaller than the sum of its proper divisors (3544821790026).

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

2105158555830 is a wasteful number, since it uses less digits than its factorization.

2105158555830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106462.

The product of its (nonzero) digits is 1200000, while the sum is 48.

The spelling of 2105158555830 in words is "two trillion, one hundred five billion, one hundred fifty-eight million, five hundred fifty-five thousand, eight hundred thirty".