1144663551 has 6 divisors (see below), whose sum is σ = 1653402920. Its totient is φ = 763109028.

The previous prime is 1144663547. The next prime is 1144663613. The reversal of 1144663551 is 1553664411.

1144663551 is a `hidden beast` number, since 1 + 1 + 4 + 46 + 63 + 551 = 666.

It is not a de Polignac number, because 1144663551 - 2² = 1144663547 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1144663951) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 63592411 + ... + 63592428.

Almost surely, 2^1144663551 is an apocalyptic number.

1144663551 is a deficient number, since it is larger than the sum of its proper divisors (508739369).

1144663551 is a wasteful number, since it uses less digits than its factorization.

1144663551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127184845 (or 127184842 counting only the distinct ones).

The product of its digits is 43200, while the sum is 36.

The square root of 1144663551 is about 33832.8767768867. The cubic root of 1144663551 is about 1046.0664771475.

The spelling of 1144663551 in words is "one billion, one hundred forty-four million, six hundred sixty-three thousand, five hundred fifty-one".