1625657533 has 2 divisors, whose sum is σ = 1625657534. Its totient is φ = 1625657532.

The previous prime is 1625657491. The next prime is 1625657581. The reversal of 1625657533 is 3357565261.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 850480569 + 775176964 = 29163^2 + 27842^2 .

It is a cyclic number.

It is not a de Polignac number, because 1625657533 - 2⁹ = 1625657021 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1625657533.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1625657633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 812828766 + 812828767.

It is an arithmetic number, because the mean of its divisors is an integer number (812828767).

Almost surely, 2^1625657533 is an apocalyptic number.

It is an amenable number.

1625657533 is a deficient number, since it is larger than the sum of its proper divisors (1).

1625657533 is an equidigital number, since it uses as much as digits as its factorization.

1625657533 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 567000, while the sum is 43.

The square root of 1625657533 is about 40319.4436097524. The cubic root of 1625657533 is about 1175.8258948004.

The spelling of 1625657533 in words is "one billion, six hundred twenty-five million, six hundred fifty-seven thousand, five hundred thirty-three".