1144661551 has 8 divisors (see below), whose sum is σ = 1249651584. Its totient is φ = 1039826520.

The previous prime is 1144661543. The next prime is 1144661569. The reversal of 1144661551 is 1551664411.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1144661551 - 2³ = 1144661543 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 (1144661521) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23025 + ... + 53098.

It is an arithmetic number, because the mean of its divisors is an integer number (156206448).

Almost surely, 2^1144661551 is an apocalyptic number.

1144661551 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1144661551 is a deficient number, since it is larger than the sum of its proper divisors (104990033).

1144661551 is a wasteful number, since it uses less digits than its factorization.

1144661551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77501.

The product of its digits is 14400, while the sum is 34.

The square root of 1144661551 is about 33832.8472198247. The cubic root of 1144661551 is about 1046.0658679047.

It can be divided in two parts, 11446615 and 51, that multiplied together give a triangular number (583777365 = T₃₄₁₆₉).

The spelling of 1144661551 in words is "one billion, one hundred forty-four million, six hundred sixty-one thousand, five hundred fifty-one".