1625630305 has 16 divisors (see below), whose sum is σ = 2106795600. Its totient is φ = 1197047808.

The previous prime is 1625630273. The next prime is 1625630327. The reversal of 1625630305 is 5030365261.

It can be written as a sum of positive squares in 8 ways, for example, as 30107169 + 1595523136 = 5487^2 + 39944^2 .

It is a cyclic number.

It is not a de Polignac number, because 1625630305 - 2⁵ = 1625630273 is a prime.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 12480 + ... + 58369.

It is an arithmetic number, because the mean of its divisors is an integer number (131674725).

Almost surely, 2^1625630305 is an apocalyptic number.

It is an amenable number.

1625630305 is a deficient number, since it is larger than the sum of its proper divisors (481165295).

1625630305 is a wasteful number, since it uses less digits than its factorization.

1625630305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71220.

The product of its (nonzero) digits is 16200, while the sum is 31.

The square root of 1625630305 is about 40319.1059548696. The cubic root of 1625630305 is about 1175.8193301610.

Adding to 1625630305 its reverse (5030365261), we get a palindrome (6655995566).

The spelling of 1625630305 in words is "one billion, six hundred twenty-five million, six hundred thirty thousand, three hundred five".