1538643466 has 8 divisors (see below), whose sum is σ = 2408311584. Its totient is φ = 735872940.

The previous prime is 1538643419. The next prime is 1538643467. The reversal of 1538643466 is 6643468351.

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

It is a Harshad number since it is a multiple of its sum of digits (46), and also a Moran number because the ratio is a prime number: 33448771 = 1538643466 / (1 + 5 + 3 + 8 + 6 + 4 + 3 + 4 + 6 + 6).

It is not an unprimeable number, because it can be changed into a prime (1538643467) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16724340 + ... + 16724431.

It is an arithmetic number, because the mean of its divisors is an integer number (301038948).

Almost surely, 2^1538643466 is an apocalyptic number.

1538643466 is a deficient number, since it is larger than the sum of its proper divisors (869668118).

1538643466 is a wasteful number, since it uses less digits than its factorization.

1538643466 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33448796.

The product of its digits is 1244160, while the sum is 46.

The square root of 1538643466 is about 39225.5460892516. The cubic root of 1538643466 is about 1154.4611758045.

The spelling of 1538643466 in words is "one billion, five hundred thirty-eight million, six hundred forty-three thousand, four hundred sixty-six".