47561231869 has 2 divisors, whose sum is σ = 47561231870. Its totient is φ = 47561231868.

The previous prime is 47561231843. The next prime is 47561231873. The reversal of 47561231869 is 96813216574.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25005096900 + 22556134969 = 158130^2 + 150187^2 .

It is a cyclic number.

It is not a de Polignac number, because 47561231869 - 2⁷ = 47561231741 is a prime.

It is a super-2 number, since 2×47561231869² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47561231819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23780615934 + 23780615935.

It is an arithmetic number, because the mean of its divisors is an integer number (23780615935).

Almost surely, 2^47561231869 is an apocalyptic number.

It is an amenable number.

47561231869 is a deficient number, since it is larger than the sum of its proper divisors (1).

47561231869 is an equidigital number, since it uses as much as digits as its factorization.

47561231869 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2177280, while the sum is 52.

The spelling of 47561231869 in words is "forty-seven billion, five hundred sixty-one million, two hundred thirty-one thousand, eight hundred sixty-nine".