1144651776 has 144 divisors (see below), whose sum is σ = 3170881728. Its totient is φ = 367001600.

The previous prime is 1144651757. The next prime is 1144651793. The reversal of 1144651776 is 6771564411.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16121821 + ... + 16121891.

It is an arithmetic number, because the mean of its divisors is an integer number (22020012).

Almost surely, 2^1144651776 is an apocalyptic number.

1144651776 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1144651776, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1585440864).

1144651776 is an abundant number, since it is smaller than the sum of its proper divisors (2026229952).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1144651776 is an frugal number, since it uses more digits than its factorization.

1144651776 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149 (or 117 counting only the distinct ones).

The product of its digits is 141120, while the sum is 42.

The square root of 1144651776 is about 33832.7027593126. The cubic root of 1144651776 is about 1046.0628902202.

The spelling of 1144651776 in words is "one billion, one hundred forty-four million, six hundred fifty-one thousand, seven hundred seventy-six".