139368447777 has 16 divisors (see below), whose sum is σ = 200134276160. Its totient is φ = 85758564672.

The previous prime is 139368447773. The next prime is 139368447791. The reversal of 139368447777 is 777744863931.

It is not a de Polignac number, because 139368447777 - 2² = 139368447773 is a prime.

It is not an unprimeable number, because it can be changed into a prime (139368447773) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 398874 + ... + 661692.

It is an arithmetic number, because the mean of its divisors is an integer number (12508392260).

Almost surely, 2^139368447777 is an apocalyptic number.

It is an amenable number.

139368447777 is a deficient number, since it is larger than the sum of its proper divisors (60765828383).

139368447777 is a wasteful number, since it uses less digits than its factorization.

139368447777 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 276432.

The product of its digits is 149361408, while the sum is 66.

The spelling of 139368447777 in words is "one hundred thirty-nine billion, three hundred sixty-eight million, four hundred forty-seven thousand, seven hundred seventy-seven".