1325807616 has 192 divisors, whose sum is σ = 4182796800. Its totient is φ = 365395968.

The previous prime is 1325807603. The next prime is 1325807621. The reversal of 1325807616 is 6167085231.

It is a tau number, because it is divible by the number of its divisors (192).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1246701 + ... + 1247763.

It is an arithmetic number, because the mean of its divisors is an integer number (21785400).

Almost surely, 2^1325807616 is an apocalyptic number.

1325807616 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1325807616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2091398400).

1325807616 is an abundant number, since it is smaller than the sum of its proper divisors (2856989184).

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

1325807616 is a wasteful number, since it uses less digits than its factorization.

1325807616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1124 (or 1104 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 39.

The square root of 1325807616 is about 36411.6412154135. The cubic root of 1325807616 is about 1098.5677270797.

The spelling of 1325807616 in words is "one billion, three hundred twenty-five million, eight hundred seven thousand, six hundred sixteen".