2106858306877 has 4 divisors (see below), whose sum is σ = 2230791148476. Its totient is φ = 1982925465280.

The previous prime is 2106858306823. The next prime is 2106858306899. The reversal of 2106858306877 is 7786038586012.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 890703700441 + 1216154606436 = 943771^2 + 1102794^2 .

It is a cyclic number.

It is not a de Polignac number, because 2106858306877 - 2²³ = 2106849918269 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2106858306277) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61966420774 + ... + 61966420807.

It is an arithmetic number, because the mean of its divisors is an integer number (557697787119).

Almost surely, 2^{2106858306877} is an apocalyptic number.

It is an amenable number.

2106858306877 is a deficient number, since it is larger than the sum of its proper divisors (123932841599).

2106858306877 is a wasteful number, since it uses less digits than its factorization.

2106858306877 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123932841598.

The product of its (nonzero) digits is 27095040, while the sum is 61.

The spelling of 2106858306877 in words is "two trillion, one hundred six billion, eight hundred fifty-eight million, three hundred six thousand, eight hundred seventy-seven".