1625785684 has 18 divisors (see below), whose sum is σ = 3022332110. Its totient is φ = 765075072.

The previous prime is 1625785663. The next prime is 1625785687. The reversal of 1625785684 is 4865875261.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 430562500 + 1195223184 = 20750^2 + 34572^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1625785687) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 702039 + ... + 704350.

Almost surely, 2^1625785684 is an apocalyptic number.

It is an amenable number.

1625785684 is a deficient number, since it is larger than the sum of its proper divisors (1396546426).

1625785684 is a wasteful number, since it uses less digits than its factorization.

1625785684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1406427 (or 1406408 counting only the distinct ones).

The product of its digits is 3225600, while the sum is 52.

The square root of 1625785684 is about 40321.0327744714. The cubic root of 1625785684 is about 1175.8567908741.

The spelling of 1625785684 in words is "one billion, six hundred twenty-five million, seven hundred eighty-five thousand, six hundred eighty-four".