1625133985 has 8 divisors (see below), whose sum is σ = 1950402600. Its totient is φ = 1299945984.

The previous prime is 1625133971. The next prime is 1625133997. The reversal of 1625133985 is 5893315261.

It can be written as a sum of positive squares in 4 ways, for example, as 19368801 + 1605765184 = 4401^2 + 40072^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1625133985 - 2⁷ = 1625133857 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41169 + ... + 70321.

It is an arithmetic number, because the mean of its divisors is an integer number (243800325).

Almost surely, 2^1625133985 is an apocalyptic number.

It is an amenable number.

1625133985 is a deficient number, since it is larger than the sum of its proper divisors (325268615).

1625133985 is a wasteful number, since it uses less digits than its factorization.

1625133985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40307.

The product of its digits is 194400, while the sum is 43.

The square root of 1625133985 is about 40312.9505866291. The cubic root of 1625133985 is about 1175.6996551342.

The spelling of 1625133985 in words is "one billion, six hundred twenty-five million, one hundred thirty-three thousand, nine hundred eighty-five".