266189439431 has 2 divisors, whose sum is σ = 266189439432. Its totient is φ = 266189439430.

The previous prime is 266189439427. The next prime is 266189439449. The reversal of 266189439431 is 134934981662.

266189439431 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 266189439431 - 2² = 266189439427 is a prime.

It is a super-2 number, since 2×266189439431² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (266189439331) 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, 133094719715 + 133094719716.

It is an arithmetic number, because the mean of its divisors is an integer number (133094719716).

Almost surely, 2^266189439431 is an apocalyptic number.

266189439431 is a deficient number, since it is larger than the sum of its proper divisors (1).

266189439431 is an equidigital number, since it uses as much as digits as its factorization.

266189439431 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6718464, while the sum is 56.

The spelling of 266189439431 in words is "two hundred sixty-six billion, one hundred eighty-nine million, four hundred thirty-nine thousand, four hundred thirty-one".