2678555623 has 4 divisors (see below), whose sum is σ = 2770919640. Its totient is φ = 2586191608.

The previous prime is 2678555587. The next prime is 2678555701. The reversal of 2678555623 is 3265558762.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2678555623 - 2²⁹ = 2141684711 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2678555123) 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, 46181965 + ... + 46182022.

It is an arithmetic number, because the mean of its divisors is an integer number (692729910).

Almost surely, 2^2678555623 is an apocalyptic number.

2678555623 is a deficient number, since it is larger than the sum of its proper divisors (92364017).

2678555623 is an equidigital number, since it uses as much as digits as its factorization.

2678555623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92364016.

The product of its digits is 3024000, while the sum is 49.

The square root of 2678555623 is about 51754.7642541245. The cubic root of 2678555623 is about 1388.7803290952.

The spelling of 2678555623 in words is "two billion, six hundred seventy-eight million, five hundred fifty-five thousand, six hundred twenty-three".