2168931807 has 48 divisors (see below), whose sum is σ = 3641763840. Its totient is φ = 1218312576.

The previous prime is 2168931703. The next prime is 2168931811. The reversal of 2168931807 is 7081398612.

2168931807 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2168931807 - 2³¹ = 21448159 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2168931907) 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, 1308123 + ... + 1309779.

It is an arithmetic number, because the mean of its divisors is an integer number (75870080).

Almost surely, 2^2168931807 is an apocalyptic number.

2168931807 is a deficient number, since it is larger than the sum of its proper divisors (1472832033).

2168931807 is a wasteful number, since it uses less digits than its factorization.

2168931807 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2012 (or 2009 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 45.

The square root of 2168931807 is about 46571.7919668118. The cubic root of 2168931807 is about 1294.4401225131.

The spelling of 2168931807 in words is "two billion, one hundred sixty-eight million, nine hundred thirty-one thousand, eight hundred seven".