7973780456 has 16 divisors (see below), whose sum is σ = 14964239940. Its totient is φ = 3983316480.

The previous prime is 7973780417. The next prime is 7973780459. The reversal of 7973780456 is 6540873797.

It can be written as a sum of positive squares in 2 ways, for example, as 5936702500 + 2037077956 = 77050^2 + 45134^2 .

It is not an unprimeable number, because it can be changed into a prime (7973780459) 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 3 ways as a sum of consecutive naturals, for example, 437225 + ... + 455096.

Almost surely, 2^7973780456 is an apocalyptic number.

It is an amenable number.

7973780456 is a deficient number, since it is larger than the sum of its proper divisors (6990459484).

7973780456 is a wasteful number, since it uses less digits than its factorization.

7973780456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 893444 (or 893440 counting only the distinct ones).

The product of its (nonzero) digits is 8890560, while the sum is 56.

The square root of 7973780456 is about 89296.0271008739. The cubic root of 7973780456 is about 1997.8126466147.

The spelling of 7973780456 in words is "seven billion, nine hundred seventy-three million, seven hundred eighty thousand, four hundred fifty-six".