7948730561 has 2 divisors, whose sum is σ = 7948730562. Its totient is φ = 7948730560.

The previous prime is 7948730551. The next prime is 7948730591. The reversal of 7948730561 is 1650378497.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6267730561 + 1681000000 = 79169^2 + 41000^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7948730561 is a prime.

It is not a weakly prime, because it can be changed into another prime (7948730501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3974365280 + 3974365281.

It is an arithmetic number, because the mean of its divisors is an integer number (3974365281).

Almost surely, 2^7948730561 is an apocalyptic number.

It is an amenable number.

7948730561 is a deficient number, since it is larger than the sum of its proper divisors (1).

7948730561 is an equidigital number, since it uses as much as digits as its factorization.

7948730561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1270080, while the sum is 50.

The square root of 7948730561 is about 89155.6535560140. The cubic root of 7948730561 is about 1995.7183871868.

The spelling of 7948730561 in words is "seven billion, nine hundred forty-eight million, seven hundred thirty thousand, five hundred sixty-one".