1625320416 has 24 divisors (see below), whose sum is σ = 4266466344. Its totient is φ = 541773440.

The previous prime is 1625320397. The next prime is 1625320441. The reversal of 1625320416 is 6140235261.

It is a tau number, because it is divible by the number of its divisors (24).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8465115 + ... + 8465306.

It is an arithmetic number, because the mean of its divisors is an integer number (177769431).

Almost surely, 2^1625320416 is an apocalyptic number.

1625320416 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1625320416 is an abundant number, since it is smaller than the sum of its proper divisors (2641145928).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1625320416 is a wasteful number, since it uses less digits than its factorization.

1625320416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16930434 (or 16930426 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 1625320416 is about 40315.2628169531. The cubic root of 1625320416 is about 1175.7446111160.

Adding to 1625320416 its reverse (6140235261), we get a palindrome (7765555677).

The spelling of 1625320416 in words is "one billion, six hundred twenty-five million, three hundred twenty thousand, four hundred sixteen".