2071681878 has 96 divisors (see below), whose sum is σ = 4970896128. Its totient is φ = 573652800.

The previous prime is 2071681877. The next prime is 2071681943. The reversal of 2071681878 is 8781861702.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2071681877) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1272501 + ... + 1274127.

It is an arithmetic number, because the mean of its divisors is an integer number (51780168).

Almost surely, 2^2071681878 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2071681878, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2485448064).

2071681878 is an abundant number, since it is smaller than the sum of its proper divisors (2899214250).

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

2071681878 is a wasteful number, since it uses less digits than its factorization.

2071681878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1778 (or 1771 counting only the distinct ones).

The product of its (nonzero) digits is 301056, while the sum is 48.

The square root of 2071681878 is about 45515.7322032723. The cubic root of 2071681878 is about 1274.7969694398.

The spelling of 2071681878 in words is "two billion, seventy-one million, six hundred eighty-one thousand, eight hundred seventy-eight".