7987744725 has 24 divisors (see below), whose sum is σ = 13295056800. Its totient is φ = 4231533120.

The previous prime is 7987744691. The next prime is 7987744733. The reversal of 7987744725 is 5274477897.

It is not a de Polignac number, because 7987744725 - 2⁸ = 7987744469 is a prime.

It is a Curzon number.

It is a congruent number.

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, 346219 + ... + 368568.

It is an arithmetic number, because the mean of its divisors is an integer number (553960700).

Almost surely, 2^7987744725 is an apocalyptic number.

7987744725 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

It is an amenable number.

7987744725 is a deficient number, since it is larger than the sum of its proper divisors (5307312075).

7987744725 is a wasteful number, since it uses less digits than its factorization.

7987744725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 714949 (or 714944 counting only the distinct ones).

The product of its digits is 27659520, while the sum is 60.

The square root of 7987744725 is about 89374.1837724966. The cubic root of 7987744725 is about 1998.9782051399.

The spelling of 7987744725 in words is "seven billion, nine hundred eighty-seven million, seven hundred forty-four thousand, seven hundred twenty-five".