2640676881 has 16 divisors (see below), whose sum is σ = 3562496000. Its totient is φ = 1739708928.

The previous prime is 2640676877. The next prime is 2640676891. The reversal of 2640676881 is 1886760462.

It is not a de Polignac number, because 2640676881 - 2² = 2640676877 is a prime.

It is a super-2 number, since 2×2640676881² = 13946348779695776322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2640676881.

It is not an unprimeable number, because it can be changed into a prime (2640676891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 199920 + ... + 212718.

It is an arithmetic number, because the mean of its divisors is an integer number (222656000).

Almost surely, 2^2640676881 is an apocalyptic number.

It is an amenable number.

2640676881 is a deficient number, since it is larger than the sum of its proper divisors (921819119).

2640676881 is a wasteful number, since it uses less digits than its factorization.

2640676881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13608.

The product of its (nonzero) digits is 774144, while the sum is 48.

The square root of 2640676881 is about 51387.5167818022. The cubic root of 2640676881 is about 1382.2027554588.

The spelling of 2640676881 in words is "two billion, six hundred forty million, six hundred seventy-six thousand, eight hundred eighty-one".