2105870767878 has 64 divisors (see below), whose sum is σ = 4278191904000. Its totient is φ = 690955584000.

The previous prime is 2105870767877. The next prime is 2105870767919. The reversal of 2105870767878 is 8787670785012.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2105870767877) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 513750273 + ... + 513754371.

It is an arithmetic number, because the mean of its divisors is an integer number (66846748500).

Almost surely, 2^{2105870767878} is an apocalyptic number.

2105870767878 is an abundant number, since it is smaller than the sum of its proper divisors (2172321136122).

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

2105870767878 is a wasteful number, since it uses less digits than its factorization.

2105870767878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8277.

The product of its (nonzero) digits is 73758720, while the sum is 66.

The spelling of 2105870767878 in words is "two trillion, one hundred five billion, eight hundred seventy million, seven hundred sixty-seven thousand, eight hundred seventy-eight".