1625303690 has 8 divisors (see below), whose sum is σ = 2925546660. Its totient is φ = 650121472.

The previous prime is 1625303689. The next prime is 1625303707. The reversal of 1625303690 is 963035261.

It can be written as a sum of positive squares in 2 ways, for example, as 1620948121 + 4355569 = 40261^2 + 2087^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×1625303690² = 5283224169455232200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1625303690.

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 3 ways as a sum of consecutive naturals, for example, 81265175 + ... + 81265194.

Almost surely, 2^1625303690 is an apocalyptic number.

1625303690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1625303690 is a deficient number, since it is larger than the sum of its proper divisors (1300242970).

1625303690 is a wasteful number, since it uses less digits than its factorization.

1625303690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162530376.

The product of its (nonzero) digits is 29160, while the sum is 35.

The square root of 1625303690 is about 40315.0553763727. The cubic root of 1625303690 is about 1175.7405779478.

The spelling of 1625303690 in words is "one billion, six hundred twenty-five million, three hundred three thousand, six hundred ninety".