1625552461 has 48 divisors (see below), whose sum is σ = 1947406608. Its totient is φ = 1347379200.

The previous prime is 1625552447. The next prime is 1625552473. The reversal of 1625552461 is 1642555261.

It can be written as a sum of positive squares in 24 ways, for example, as 1193702500 + 431849961 = 34550^2 + 20781^2 .

It is not a de Polignac number, because 1625552461 - 2⁷ = 1625552333 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 1625552461.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1625552491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 9396171 + ... + 9396343.

It is an arithmetic number, because the mean of its divisors is an integer number (40570971).

Almost surely, 2^1625552461 is an apocalyptic number.

It is an amenable number.

1625552461 is a deficient number, since it is larger than the sum of its proper divisors (321854147).

1625552461 is a wasteful number, since it uses less digits than its factorization.

1625552461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 322 (or 305 counting only the distinct ones).

The product of its digits is 72000, while the sum is 37.

The square root of 1625552461 is about 40318.1405945264. The cubic root of 1625552461 is about 1175.8005616582.

The spelling of 1625552461 in words is "one billion, six hundred twenty-five million, five hundred fifty-two thousand, four hundred sixty-one".