139405561843 has 2 divisors, whose sum is σ = 139405561844. Its totient is φ = 139405561842.

The previous prime is 139405561837. The next prime is 139405561859. The reversal of 139405561843 is 348165504931.

139405561843 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 139405561843 - 2⁵ = 139405561811 is a prime.

It is not a weakly prime, because it can be changed into another prime (139405561643) 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, 69702780921 + 69702780922.

It is an arithmetic number, because the mean of its divisors is an integer number (69702780922).

Almost surely, 2^139405561843 is an apocalyptic number.

139405561843 is a deficient number, since it is larger than the sum of its proper divisors (1).

139405561843 is an equidigital number, since it uses as much as digits as its factorization.

139405561843 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1555200, while the sum is 49.

The spelling of 139405561843 in words is "one hundred thirty-nine billion, four hundred five million, five hundred sixty-one thousand, eight hundred forty-three".