139405561807 has 16 divisors (see below), whose sum is σ = 144096496128. Its totient is φ = 134792563360.

The previous prime is 139405561667. The next prime is 139405561811. The reversal of 139405561807 is 708165504931.

139405561807 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-139405561807 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139405561837) 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 in 15 ways as a sum of consecutive naturals, for example, 11143518 + ... + 11156020.

It is an arithmetic number, because the mean of its divisors is an integer number (9006031008).

Almost surely, 2^139405561807 is an apocalyptic number.

139405561807 is a deficient number, since it is larger than the sum of its proper divisors (4690934321).

139405561807 is a wasteful number, since it uses less digits than its factorization.

139405561807 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15590.

The product of its (nonzero) digits is 907200, while the sum is 49.

The spelling of 139405561807 in words is "one hundred thirty-nine billion, four hundred five million, five hundred sixty-one thousand, eight hundred seven".