47902518721 has 2 divisors, whose sum is σ = 47902518722. Its totient is φ = 47902518720.

The previous prime is 47902518707. The next prime is 47902518779. The reversal of 47902518721 is 12781520974.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40024003600 + 7878515121 = 200060^2 + 88761^2 .

It is a cyclic number.

It is not a de Polignac number, because 47902518721 - 2⁷ = 47902518593 is a prime.

It is not a weakly prime, because it can be changed into another prime (47902518221) 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 as a sum of consecutive naturals, namely, 23951259360 + 23951259361.

It is an arithmetic number, because the mean of its divisors is an integer number (23951259361).

Almost surely, 2^47902518721 is an apocalyptic number.

It is an amenable number.

47902518721 is a deficient number, since it is larger than the sum of its proper divisors (1).

47902518721 is an equidigital number, since it uses as much as digits as its factorization.

47902518721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 282240, while the sum is 46.

The spelling of 47902518721 in words is "forty-seven billion, nine hundred two million, five hundred eighteen thousand, seven hundred twenty-one".