1625904523 has 16 divisors (see below), whose sum is σ = 1759021056. Its totient is φ = 1498432320.

The previous prime is 1625904521. The next prime is 1625904529. The reversal of 1625904523 is 3254095261.

It is not a de Polignac number, because 1625904523 - 2¹ = 1625904521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1625904521) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 161236 + ... + 171022.

It is an arithmetic number, because the mean of its divisors is an integer number (109938816).

Almost surely, 2^1625904523 is an apocalyptic number.

1625904523 is a deficient number, since it is larger than the sum of its proper divisors (133116533).

1625904523 is a wasteful number, since it uses less digits than its factorization.

1625904523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10074.

The product of its (nonzero) digits is 64800, while the sum is 37.

The square root of 1625904523 is about 40322.5064077123. The cubic root of 1625904523 is about 1175.8854404560.

Adding to 1625904523 its reverse (3254095261), we get a palindrome (4879999784).

The spelling of 1625904523 in words is "one billion, six hundred twenty-five million, nine hundred four thousand, five hundred twenty-three".