43686204640847 has 2 divisors, whose sum is σ = 43686204640848. Its totient is φ = 43686204640846.

The previous prime is 43686204640781. The next prime is 43686204640891. The reversal of 43686204640847 is 74804640268634.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 43686204640847 - 2¹² = 43686204636751 is a prime.

It is a super-3 number, since 3×43686204640847³ (a number of 42 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 43686204640847.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43686204640447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21843102320423 + 21843102320424.

It is an arithmetic number, because the mean of its divisors is an integer number (21843102320424).

Almost surely, 2^{43686204640847} is an apocalyptic number.

43686204640847 is a deficient number, since it is larger than the sum of its proper divisors (1).

43686204640847 is an equidigital number, since it uses as much as digits as its factorization.

43686204640847 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 148635648, while the sum is 62.

The spelling of 43686204640847 in words is "forty-three trillion, six hundred eighty-six billion, two hundred four million, six hundred forty thousand, eight hundred forty-seven".