47728782709 has 2 divisors, whose sum is σ = 47728782710. Its totient is φ = 47728782708.

The previous prime is 47728782679. The next prime is 47728782791. The reversal of 47728782709 is 90728782774.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 42464844900 + 5263937809 = 206070^2 + 72553^2 .

It is a cyclic number.

It is not a de Polignac number, because 47728782709 - 2⁵ = 47728782677 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47728782509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23864391354 + 23864391355.

It is an arithmetic number, because the mean of its divisors is an integer number (23864391355).

Almost surely, 2^47728782709 is an apocalyptic number.

It is an amenable number.

47728782709 is a deficient number, since it is larger than the sum of its proper divisors (1).

47728782709 is an equidigital number, since it uses as much as digits as its factorization.

47728782709 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 22127616, while the sum is 61.

The spelling of 47728782709 in words is "forty-seven billion, seven hundred twenty-eight million, seven hundred eighty-two thousand, seven hundred nine".