1144644164 has 6 divisors (see below), whose sum is σ = 2003127294. Its totient is φ = 572322080.

The previous prime is 1144644143. The next prime is 1144644167. The reversal of 1144644164 is 4614464411.

It can be written as a sum of positive squares in only one way, i.e., 1039417600 + 105226564 = 32240^2 + 10258^2 .

It is not an unprimeable number, because it can be changed into a prime (1144644167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 143080517 + ... + 143080524.

It is an arithmetic number, because the mean of its divisors is an integer number (333854549).

Almost surely, 2^1144644164 is an apocalyptic number.

It is an amenable number.

1144644164 is a deficient number, since it is larger than the sum of its proper divisors (858483130).

1144644164 is a wasteful number, since it uses less digits than its factorization.

1144644164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 286161045 (or 286161043 counting only the distinct ones).

The product of its digits is 36864, while the sum is 35.

The square root of 1144644164 is about 33832.5902644181. The cubic root of 1144644164 is about 1046.0605714223.

The spelling of 1144644164 in words is "one billion, one hundred forty-four million, six hundred forty-four thousand, one hundred sixty-four".