7725857647 has 8 divisors (see below), whose sum is σ = 7876879344. Its totient is φ = 7575030528.

The previous prime is 7725857627. The next prime is 7725857663. The reversal of 7725857647 is 7467585277.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 7725857647 - 2¹⁹ = 7725333359 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 7725857591 and 7725857600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7725857627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32863 + ... + 128575.

It is an arithmetic number, because the mean of its divisors is an integer number (984609918).

Almost surely, 2^7725857647 is an apocalyptic number.

7725857647 is a deficient number, since it is larger than the sum of its proper divisors (151021697).

7725857647 is a wasteful number, since it uses less digits than its factorization.

7725857647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97289.

The product of its digits is 23049600, while the sum is 58.

The square root of 7725857647 is about 87896.8580041403. The cubic root of 7725857647 is about 1976.8887680949. Note that the first 3 decimals are identical.

The spelling of 7725857647 in words is "seven billion, seven hundred twenty-five million, eight hundred fifty-seven thousand, six hundred forty-seven".