42731404441669 has 2 divisors, whose sum is σ = 42731404441670. Its totient is φ = 42731404441668.

The previous prime is 42731404441631. The next prime is 42731404441673. The reversal of 42731404441669 is 96614440413724.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 40105141111044 + 2626263330625 = 6332862^2 + 1620575^2 .

It is a cyclic number.

It is not a de Polignac number, because 42731404441669 - 2¹¹ = 42731404439621 is a prime.

It is a super-2 number, since 2×42731404441669² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42731404441699) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21365702220834 + 21365702220835.

It is an arithmetic number, because the mean of its divisors is an integer number (21365702220835).

Almost surely, 2^{42731404441669} is an apocalyptic number.

It is an amenable number.

42731404441669 is a deficient number, since it is larger than the sum of its proper divisors (1).

42731404441669 is an equidigital number, since it uses as much as digits as its factorization.

42731404441669 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13934592, while the sum is 55.

The spelling of 42731404441669 in words is "forty-two trillion, seven hundred thirty-one billion, four hundred four million, four hundred forty-one thousand, six hundred sixty-nine".