7648947481 has 12 divisors (see below), whose sum is σ = 8930847780. Its totient is φ = 6531856800.

The previous prime is 7648947473. The next prime is 7648947487. The reversal of 7648947481 is 1847498467.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1331082256 + 6317865225 = 36484^2 + 79485^2 .

It is not a de Polignac number, because 7648947481 - 2³ = 7648947473 is a prime.

It is a super-2 number, since 2×7648947481² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7648947487) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 276970 + ... + 303331.

It is an arithmetic number, because the mean of its divisors is an integer number (744237315).

Almost surely, 2^7648947481 is an apocalyptic number.

It is an amenable number.

7648947481 is a deficient number, since it is larger than the sum of its proper divisors (1281900299).

7648947481 is a wasteful number, since it uses less digits than its factorization.

7648947481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 580584 (or 580577 counting only the distinct ones).

The product of its digits is 10838016, while the sum is 58.

The square root of 7648947481 is about 87458.2613650649. The cubic root of 7648947481 is about 1970.3069669475.

The spelling of 7648947481 in words is "seven billion, six hundred forty-eight million, nine hundred forty-seven thousand, four hundred eighty-one".