2865837681 has 48 divisors (see below), whose sum is σ = 4963196160. Its totient is φ = 1558811520.

The previous prime is 2865837673. The next prime is 2865837719. The reversal of 2865837681 is 1867385682.

2865837681 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 2865837681 - 2³ = 2865837673 is a prime.

It is a super-2 number, since 2×2865837681² = 16426051227678915522, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2865837631) 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, 118671 + ... + 140763.

It is an arithmetic number, because the mean of its divisors is an integer number (103399920).

Almost surely, 2^2865837681 is an apocalyptic number.

2865837681 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2865837681 is a deficient number, since it is larger than the sum of its proper divisors (2097358479).

2865837681 is a wasteful number, since it uses less digits than its factorization.

2865837681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22206 (or 22203 counting only the distinct ones).

The product of its digits is 3870720, while the sum is 54.

The square root of 2865837681 is about 53533.5192286104. The cubic root of 2865837681 is about 1420.4213655635.

The spelling of 2865837681 in words is "two billion, eight hundred sixty-five million, eight hundred thirty-seven thousand, six hundred eighty-one".