139405561859 has 2 divisors, whose sum is σ = 139405561860. Its totient is φ = 139405561858.

The previous prime is 139405561843. The next prime is 139405561861. The reversal of 139405561859 is 958165504931.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 139405561859 - 2⁴ = 139405561843 is a prime.

Together with 139405561861, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (139405567859) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69702780929 + 69702780930.

It is an arithmetic number, because the mean of its divisors is an integer number (69702780930).

Almost surely, 2^139405561859 is an apocalyptic number.

139405561859 is a deficient number, since it is larger than the sum of its proper divisors (1).

139405561859 is an equidigital number, since it uses as much as digits as its factorization.

139405561859 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5832000, while the sum is 56.

The spelling of 139405561859 in words is "one hundred thirty-nine billion, four hundred five million, five hundred sixty-one thousand, eight hundred fifty-nine".