1625423636 has 12 divisors (see below), whose sum is σ = 2872108512. Its totient is φ = 804821208.

The previous prime is 1625423617. The next prime is 1625423687. The reversal of 1625423636 is 6363245261.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 1625423636.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1972190 + ... + 1973013.

It is an arithmetic number, because the mean of its divisors is an integer number (239342376).

Almost surely, 2^1625423636 is an apocalyptic number.

It is an amenable number.

1625423636 is a deficient number, since it is larger than the sum of its proper divisors (1246684876).

1625423636 is a wasteful number, since it uses less digits than its factorization.

1625423636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3945310 (or 3945308 counting only the distinct ones).

The product of its digits is 155520, while the sum is 38.

The square root of 1625423636 is about 40316.5429569550. The cubic root of 1625423636 is about 1175.7695001140.

Adding to 1625423636 its reverse (6363245261), we get a palindrome (7988668897).

The spelling of 1625423636 in words is "one billion, six hundred twenty-five million, four hundred twenty-three thousand, six hundred thirty-six".