1263344144 has 10 divisors (see below), whose sum is σ = 2447729310. Its totient is φ = 631672064.

The previous prime is 1263344129. The next prime is 1263344153. The reversal of 1263344144 is 4414433621.

It can be written as a sum of positive squares in only one way, i.e., 1155184144 + 108160000 = 33988^2 + 10400^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1263344144.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39479489 + ... + 39479520.

It is an arithmetic number, because the mean of its divisors is an integer number (244772931).

Almost surely, 2^1263344144 is an apocalyptic number.

It is an amenable number.

1263344144 is a deficient number, since it is larger than the sum of its proper divisors (1184385166).

1263344144 is an equidigital number, since it uses as much as digits as its factorization.

1263344144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78959017 (or 78959011 counting only the distinct ones).

The product of its digits is 27648, while the sum is 32.

The square root of 1263344144 is about 35543.5527768399. The cubic root of 1263344144 is about 1081.0369966597.

Adding to 1263344144 its reverse (4414433621), we get a palindrome (5677777765).

The spelling of 1263344144 in words is "one billion, two hundred sixty-three million, three hundred forty-four thousand, one hundred forty-four".