139925458549 has 4 divisors (see below), whose sum is σ = 139946383980. Its totient is φ = 139904533120.

The previous prime is 139925458531. The next prime is 139925458591. The reversal of 139925458549 is 945854529931.

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 118606538449 + 21318920100 = 344393^2 + 146010^2 .

It is a cyclic number.

It is not a de Polignac number, because 139925458549 - 2¹¹ = 139925456501 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 (139925458529) 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, 10452682 + ... + 10466059.

It is an arithmetic number, because the mean of its divisors is an integer number (34986595995).

Almost surely, 2^139925458549 is an apocalyptic number.

It is an amenable number.

139925458549 is a deficient number, since it is larger than the sum of its proper divisors (20925431).

139925458549 is an equidigital number, since it uses as much as digits as its factorization.

139925458549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20925430.

The product of its digits is 69984000, while the sum is 64.

The spelling of 139925458549 in words is "one hundred thirty-nine billion, nine hundred twenty-five million, four hundred fifty-eight thousand, five hundred forty-nine".