2681677643 has 4 divisors (see below), whose sum is σ = 2681786640. Its totient is φ = 2681568648.

The previous prime is 2681677639. The next prime is 2681677657. The reversal of 2681677643 is 3467761862.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 3467761862 = 2 ⋅1733880931.

It is a cyclic number.

It is not a de Polignac number, because 2681677643 - 2² = 2681677639 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2681677591 and 2681677600.

It is not an unprimeable number, because it can be changed into a prime (2681677343) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1778 + ... + 73256.

It is an arithmetic number, because the mean of its divisors is an integer number (670446660).

Almost surely, 2^2681677643 is an apocalyptic number.

2681677643 is a deficient number, since it is larger than the sum of its proper divisors (108997).

2681677643 is an equidigital number, since it uses as much as digits as its factorization.

2681677643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108996.

The product of its digits is 2032128, while the sum is 50.

The square root of 2681677643 is about 51784.9171381011. The cubic root of 2681677643 is about 1389.3196889986.

The spelling of 2681677643 in words is "two billion, six hundred eighty-one million, six hundred seventy-seven thousand, six hundred forty-three".