1625552563 has 4 divisors (see below), whose sum is σ = 1721173320. Its totient is φ = 1529931808.

The previous prime is 1625552507. The next prime is 1625552569. The reversal of 1625552563 is 3652555261.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3652555261 = 53 ⋅68916137.

It is a cyclic number.

It is not a de Polignac number, because 1625552563 - 2¹⁷ = 1625421491 is a prime.

It is a super-2 number, since 2×1625552563² = 5284842270151737938, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1625552569) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47810353 + ... + 47810386.

It is an arithmetic number, because the mean of its divisors is an integer number (430293330).

Almost surely, 2^1625552563 is an apocalyptic number.

1625552563 is a deficient number, since it is larger than the sum of its proper divisors (95620757).

1625552563 is an equidigital number, since it uses as much as digits as its factorization.

1625552563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95620756.

The product of its digits is 270000, while the sum is 40.

The square root of 1625552563 is about 40318.1418594657. The cubic root of 1625552563 is about 1175.8005862512.

The spelling of 1625552563 in words is "one billion, six hundred twenty-five million, five hundred fifty-two thousand, five hundred sixty-three".