43781077340447 has 2 divisors, whose sum is σ = 43781077340448. Its totient is φ = 43781077340446.

The previous prime is 43781077340347. The next prime is 43781077340479. The reversal of 43781077340447 is 74404377018734.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 43781077340447 - 2¹⁶ = 43781077274911 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43781077340347) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21890538670223 + 21890538670224.

It is an arithmetic number, because the mean of its divisors is an integer number (21890538670224).

Almost surely, 2^{43781077340447} is an apocalyptic number.

43781077340447 is a deficient number, since it is larger than the sum of its proper divisors (1).

43781077340447 is an equidigital number, since it uses as much as digits as its factorization.

43781077340447 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 44255232, while the sum is 59.

The spelling of 43781077340447 in words is "forty-three trillion, seven hundred eighty-one billion, seventy-seven million, three hundred forty thousand, four hundred forty-seven".