139285705857 has 32 divisors (see below), whose sum is σ = 188048465280. Its totient is φ = 91698946560.

The previous prime is 139285705849. The next prime is 139285705901. The reversal of 139285705857 is 758507582931.

It is not a de Polignac number, because 139285705857 - 2³ = 139285705849 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 139285705857.

It is not an unprimeable number, because it can be changed into a prime (139285705157) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 90976182 + ... + 90977712.

It is an arithmetic number, because the mean of its divisors is an integer number (5876514540).

Almost surely, 2^139285705857 is an apocalyptic number.

It is an amenable number.

139285705857 is a deficient number, since it is larger than the sum of its proper divisors (48762759423).

139285705857 is a wasteful number, since it uses less digits than its factorization.

139285705857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2753.

The product of its (nonzero) digits is 21168000, while the sum is 60.

The spelling of 139285705857 in words is "one hundred thirty-nine billion, two hundred eighty-five million, seven hundred five thousand, eight hundred fifty-seven".