2164378144 has 12 divisors (see below), whose sum is σ = 4261119534. Its totient is φ = 1082189056.

The previous prime is 2164378133. The next prime is 2164378189. The reversal of 2164378144 is 4418734612.

It can be written as a sum of positive squares in only one way, i.e., 2151846544 + 12531600 = 46388^2 + 3540^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2164378097 and 2164378106.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33818377 + ... + 33818440.

Almost surely, 2^2164378144 is an apocalyptic number.

It is an amenable number.

2164378144 is a deficient number, since it is larger than the sum of its proper divisors (2096741390).

2164378144 is an equidigital number, since it uses as much as digits as its factorization.

2164378144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67636827 (or 67636819 counting only the distinct ones).

The product of its digits is 129024, while the sum is 40.

The square root of 2164378144 is about 46522.8776410058. The cubic root of 2164378144 is about 1293.5335973116.

The spelling of 2164378144 in words is "two billion, one hundred sixty-four million, three hundred seventy-eight thousand, one hundred forty-four".