1663451564 has 12 divisors (see below), whose sum is σ = 3082278024. Its totient is φ = 782800704.

The previous prime is 1663451527. The next prime is 1663451567. The reversal of 1663451564 is 4651543661.

It is a super-2 number, since 2×1663451564² = 5534142211548092192, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1663451567) 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, 12231194 + ... + 12231329.

It is an arithmetic number, because the mean of its divisors is an integer number (256856502).

Almost surely, 2^1663451564 is an apocalyptic number.

It is an amenable number.

1663451564 is a deficient number, since it is larger than the sum of its proper divisors (1418826460).

1663451564 is a wasteful number, since it uses less digits than its factorization.

1663451564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24462544 (or 24462542 counting only the distinct ones).

The product of its digits is 259200, while the sum is 41.

The square root of 1663451564 is about 40785.4332329571. The cubic root of 1663451564 is about 1184.8682255981.

The spelling of 1663451564 in words is "one billion, six hundred sixty-three million, four hundred fifty-one thousand, five hundred sixty-four".