1144664457 has 8 divisors (see below), whose sum is σ = 1526777280. Its totient is φ = 762830640.

The previous prime is 1144664431. The next prime is 1144664471. The reversal of 1144664457 is 7544664411.

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

It is not a de Polignac number, because 1144664457 - 2⁶ = 1144664393 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1144664407) 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, 59982 + ... + 76727.

It is an arithmetic number, because the mean of its divisors is an integer number (190847160).

Almost surely, 2^1144664457 is an apocalyptic number.

It is an amenable number.

1144664457 is a deficient number, since it is larger than the sum of its proper divisors (382112823).

1144664457 is a wasteful number, since it uses less digits than its factorization.

1144664457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139503.

The product of its digits is 322560, while the sum is 42.

The square root of 1144664457 is about 33832.8901662273. The cubic root of 1144664457 is about 1046.0667531343.

The spelling of 1144664457 in words is "one billion, one hundred forty-four million, six hundred sixty-four thousand, four hundred fifty-seven".