7748648653 has 4 divisors (see below), whose sum is σ = 7748869788. Its totient is φ = 7748427520.

The previous prime is 7748648651. The next prime is 7748648681. The reversal of 7748648653 is 3568468477.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5052650724 + 2695997929 = 71082^2 + 51923^2 .

It is a cyclic number.

It is not a de Polignac number, because 7748648653 - 2¹ = 7748648651 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 (7748648651) 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 3 ways as a sum of consecutive naturals, for example, 45076 + ... + 132397.

It is an arithmetic number, because the mean of its divisors is an integer number (1937217447).

Almost surely, 2^7748648653 is an apocalyptic number.

It is an amenable number.

7748648653 is a deficient number, since it is larger than the sum of its proper divisors (221135).

7748648653 is a wasteful number, since it uses less digits than its factorization.

7748648653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221134.

The product of its digits is 27095040, while the sum is 58.

The square root of 7748648653 is about 88026.4088384844. The cubic root of 7748648653 is about 1978.8307769725.

The spelling of 7748648653 in words is "seven billion, seven hundred forty-eight million, six hundred forty-eight thousand, six hundred fifty-three".