1625708640 has 192 divisors, whose sum is σ = 5449187520. Its totient is φ = 405995520.

The previous prime is 1625708599. The next prime is 1625708653. The reversal of 1625708640 is 468075261.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2292606 + ... + 2293314.

It is an arithmetic number, because the mean of its divisors is an integer number (28381185).

Almost surely, 2^1625708640 is an apocalyptic number.

1625708640 is a gapful number since it is divisible by the number (10) 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 1625708640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2724593760).

1625708640 is an abundant number, since it is smaller than the sum of its proper divisors (3823478880).

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

1625708640 is a wasteful number, since it uses less digits than its factorization.

1625708640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1025 (or 1017 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 39.

The square root of 1625708640 is about 40320.0773808781. The cubic root of 1625708640 is about 1175.8382164411.

The spelling of 1625708640 in words is "one billion, six hundred twenty-five million, seven hundred eight thousand, six hundred forty".