2144778634 has 16 divisors (see below), whose sum is σ = 3469092480. Its totient is φ = 991167840.

The previous prime is 2144778631. The next prime is 2144778641. The reversal of 2144778634 is 4368774412.

It is not an unprimeable number, because it can be changed into a prime (2144778631) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 686754 + ... + 689869.

It is an arithmetic number, because the mean of its divisors is an integer number (216818280).

Almost surely, 2^2144778634 is an apocalyptic number.

2144778634 is a deficient number, since it is larger than the sum of its proper divisors (1324313846).

2144778634 is a wasteful number, since it uses less digits than its factorization.

2144778634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1376685.

The product of its digits is 903168, while the sum is 46.

The square root of 2144778634 is about 46311.7548145177. The cubic root of 2144778634 is about 1289.6172239315.

It can be divided in two parts, 2144778 and 634, that added together give a palindrome (2145412).

The spelling of 2144778634 in words is "two billion, one hundred forty-four million, seven hundred seventy-eight thousand, six hundred thirty-four".