1625535653 has 8 divisors (see below), whose sum is σ = 1895668800. Its totient is φ = 1393315980.

The previous prime is 1625535647. The next prime is 1625535673. The reversal of 1625535653 is 3565355261.

It is not a de Polignac number, because 1625535653 - 2¹⁰ = 1625534629 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1625535653.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1625535673) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2369243 + ... + 2369928.

It is an arithmetic number, because the mean of its divisors is an integer number (236958600).

Almost surely, 2^1625535653 is an apocalyptic number.

It is an amenable number.

1625535653 is a deficient number, since it is larger than the sum of its proper divisors (270133147).

1625535653 is an frugal number, since it uses more digits than its factorization.

1625535653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4739192 (or 4739178 counting only the distinct ones).

The product of its digits is 405000, while the sum is 41.

The square root of 1625535653 is about 40317.9321518354. The cubic root of 1625535653 is about 1175.7965091029.

The spelling of 1625535653 in words is "one billion, six hundred twenty-five million, five hundred thirty-five thousand, six hundred fifty-three".