7749648391 has 8 divisors (see below), whose sum is σ = 7866493040. Its totient is φ = 7633092672.

The previous prime is 7749648377. The next prime is 7749648419. The reversal of 7749648391 is 1938469477.

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 7749648391 - 2¹¹ = 7749646343 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7749648091) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17880 + ... + 125773.

It is an arithmetic number, because the mean of its divisors is an integer number (983311630).

Almost surely, 2^7749648391 is an apocalyptic number.

7749648391 is a deficient number, since it is larger than the sum of its proper divisors (116844649).

7749648391 is a wasteful number, since it uses less digits than its factorization.

7749648391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144465.

The product of its digits is 9144576, while the sum is 58.

The square root of 7749648391 is about 88032.0872807183. The cubic root of 7749648391 is about 1978.9158768540.

The spelling of 7749648391 in words is "seven billion, seven hundred forty-nine million, six hundred forty-eight thousand, three hundred ninety-one".