1663141451 has 4 divisors (see below), whose sum is σ = 1668388272. Its totient is φ = 1657894632.

The previous prime is 1663141429. The next prime is 1663141471. The reversal of 1663141451 is 1541413661.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1663141451 - 2¹⁸ = 1662879307 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1663141471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2622935 + ... + 2623568.

It is an arithmetic number, because the mean of its divisors is an integer number (417097068).

Almost surely, 2^1663141451 is an apocalyptic number.

1663141451 is a deficient number, since it is larger than the sum of its proper divisors (5246821).

1663141451 is an equidigital number, since it uses as much as digits as its factorization.

1663141451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5246820.

The product of its digits is 8640, while the sum is 32.

The square root of 1663141451 is about 40781.6312940029. The cubic root of 1663141451 is about 1184.7945903760.

The spelling of 1663141451 in words is "one billion, six hundred sixty-three million, one hundred forty-one thousand, four hundred fifty-one".