1663135125 has 32 divisors (see below), whose sum is σ = 2771967744. Its totient is φ = 885560000.

The previous prime is 1663135093. The next prime is 1663135153. The reversal of 1663135125 is 5215313661.

It is not a de Polignac number, because 1663135125 - 2⁵ = 1663135093 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 250600 + ... + 257150.

It is an arithmetic number, because the mean of its divisors is an integer number (86623992).

Almost surely, 2^1663135125 is an apocalyptic number.

1663135125 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1663135125 is a deficient number, since it is larger than the sum of its proper divisors (1108832619).

1663135125 is an equidigital number, since it uses as much as digits as its factorization.

1663135125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7246 (or 7236 counting only the distinct ones).

The product of its digits is 16200, while the sum is 33.

The square root of 1663135125 is about 40781.5537345011. The cubic root of 1663135125 is about 1184.7930881947.

Adding to 1663135125 its reverse (5215313661), we get a palindrome (6878448786).

The spelling of 1663135125 in words is "one billion, six hundred sixty-three million, one hundred thirty-five thousand, one hundred twenty-five".