1906450625 has 10 divisors (see below), whose sum is σ = 2382301482. Its totient is φ = 1525160000.

The previous prime is 1906450619. The next prime is 1906450639. The reversal of 1906450625 is 5260546091.

It can be written as a sum of positive squares in 5 ways, for example, as 1241223361 + 665227264 = 35231^2 + 25792^2 .

It is a de Polignac number, because none of the positive numbers 2^k-1906450625 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 1524536 + ... + 1525785.

Almost surely, 2^1906450625 is an apocalyptic number.

It is an amenable number.

1906450625 is a deficient number, since it is larger than the sum of its proper divisors (475850857).

1906450625 is an frugal number, since it uses more digits than its factorization.

1906450625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3050341 (or 3050326 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 38.

The square root of 1906450625 is about 43662.9204818001. The cubic root of 1906450625 is about 1239.9624132294.

The spelling of 1906450625 in words is "one billion, nine hundred six million, four hundred fifty thousand, six hundred twenty-five".