1994528625 has 16 divisors (see below), whose sum is σ = 3318896256. Its totient is φ = 1063748400.

The previous prime is 1994528609. The next prime is 1994528659. The reversal of 1994528625 is 5268254991.

It is not a de Polignac number, because 1994528625 - 2⁴ = 1994528609 is a prime.

It is a Curzon number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 2658997 + ... + 2659746.

It is an arithmetic number, because the mean of its divisors is an integer number (207431016).

Almost surely, 2^1994528625 is an apocalyptic number.

1994528625 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1994528625 is a deficient number, since it is larger than the sum of its proper divisors (1324367631).

1994528625 is an equidigital number, since it uses as much as digits as its factorization.

1994528625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5318761 (or 5318751 counting only the distinct ones).

The product of its digits is 1555200, while the sum is 51.

The square root of 1994528625 is about 44660.1458237655. The cubic root of 1994528625 is about 1258.7710838515.

The spelling of 1994528625 in words is "one billion, nine hundred ninety-four million, five hundred twenty-eight thousand, six hundred twenty-five".