7925617728 has 168 divisors, whose sum is σ = 26800616960. Its totient is φ = 2191380480.

The previous prime is 7925617691. The next prime is 7925617741. The reversal of 7925617728 is 8277165297.

It is a happy number.

7925617728 is a `hidden beast` number, since 7 + 9 + 2 + 561 + 7 + 72 + 8 = 666.

It is a tau number, because it is divible by the number of its divisors (168).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 93288 + ... + 156696.

Almost surely, 2^7925617728 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7925617728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13400308480).

7925617728 is an abundant number, since it is smaller than the sum of its proper divisors (18874999232).

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

7925617728 is a wasteful number, since it uses less digits than its factorization.

7925617728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63465 (or 63452 counting only the distinct ones).

The product of its digits is 2963520, while the sum is 54.

The square root of 7925617728 is about 89025.9385123235. The cubic root of 7925617728 is about 1993.7821666400.

The spelling of 7925617728 in words is "seven billion, nine hundred twenty-five million, six hundred seventeen thousand, seven hundred twenty-eight".