1625635873 has 4 divisors (see below), whose sum is σ = 1629117360. Its totient is φ = 1622154388.

The previous prime is 1625635853. The next prime is 1625635903. The reversal of 1625635873 is 3785365261.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 1625635873 - 2⁵ = 1625635841 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1625635813) 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, 1740043 + ... + 1740976.

It is an arithmetic number, because the mean of its divisors is an integer number (407279340).

Almost surely, 2^1625635873 is an apocalyptic number.

It is an amenable number.

1625635873 is a deficient number, since it is larger than the sum of its proper divisors (3481487).

1625635873 is an equidigital number, since it uses as much as digits as its factorization.

1625635873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3481486.

The product of its digits is 907200, while the sum is 46.

The square root of 1625635873 is about 40319.1750039606. The cubic root of 1625635873 is about 1175.8206726054.

The spelling of 1625635873 in words is "one billion, six hundred twenty-five million, six hundred thirty-five thousand, eight hundred seventy-three".