139848944657 has 4 divisors (see below), whose sum is σ = 140039735220. Its totient is φ = 139658154096.

The previous prime is 139848944563. The next prime is 139848944663. The reversal of 139848944657 is 756449848931.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 134295863296 + 5553081361 = 366464^2 + 74519^2 .

It is a cyclic number.

It is not a de Polignac number, because 139848944657 - 2²⁴ = 139832167441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (139848941657) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 95394182 + ... + 95395647.

It is an arithmetic number, because the mean of its divisors is an integer number (35009933805).

Almost surely, 2^139848944657 is an apocalyptic number.

It is an amenable number.

139848944657 is a deficient number, since it is larger than the sum of its proper divisors (190790563).

139848944657 is an equidigital number, since it uses as much as digits as its factorization.

139848944657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190790562.

The product of its digits is 209018880, while the sum is 68.

The spelling of 139848944657 in words is "one hundred thirty-nine billion, eight hundred forty-eight million, nine hundred forty-four thousand, six hundred fifty-seven".