2378676643 has 4 divisors (see below), whose sum is σ = 2718487600. Its totient is φ = 2038865688.

The previous prime is 2378676637. The next prime is 2378676701. The reversal of 2378676643 is 3466768732.

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 2378676643 - 2²⁵ = 2345122211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2378676343) 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, 169905468 + ... + 169905481.

It is an arithmetic number, because the mean of its divisors is an integer number (679621900).

Almost surely, 2^2378676643 is an apocalyptic number.

2378676643 is a deficient number, since it is larger than the sum of its proper divisors (339810957).

2378676643 is an equidigital number, since it uses as much as digits as its factorization.

2378676643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 339810956.

The product of its digits is 6096384, while the sum is 52.

The square root of 2378676643 is about 48771.6786977853. The cubic root of 2378676643 is about 1334.8889438026. Note that the first 3 decimals are identical.

The spelling of 2378676643 in words is "two billion, three hundred seventy-eight million, six hundred seventy-six thousand, six hundred forty-three".