2105555676 has 72 divisors (see below), whose sum is σ = 5721851520. Its totient is φ = 600874848.

The previous prime is 2105555671. The next prime is 2105555687. The reversal of 2105555676 is 6765555012.

It is a happy number.

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2105555671) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 682305 + ... + 685383.

It is an arithmetic number, because the mean of its divisors is an integer number (79470160).

Almost surely, 2^2105555676 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 2105555676, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2860925760).

2105555676 is an abundant number, since it is smaller than the sum of its proper divisors (3616295844).

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

2105555676 is a wasteful number, since it uses less digits than its factorization.

2105555676 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4263 (or 4254 counting only the distinct ones).

The product of its (nonzero) digits is 315000, while the sum is 42.

The square root of 2105555676 is about 45886.3343055424. The cubic root of 2105555676 is about 1281.7074535919.

The spelling of 2105555676 in words is "two billion, one hundred five million, five hundred fifty-five thousand, six hundred seventy-six".