139726371589281 has 135 divisors (see below), whose sum is σ = 215313298498441. Its totient is φ = 90300993543936.

The previous prime is 139726371589229. The next prime is 139726371589361. The reversal of 139726371589281 is 182985173627931.

It is a happy number.

The square root of 139726371589281 is 11820591.

It is a perfect power (a square), and thus also a powerful number.

139726371589281 is a `hidden beast` number, since 1 + 3 + 9 + 7 + 2 + 6 + 37 + 1 + 589 + 2 + 8 + 1 = 666.

139726371589281 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 12553185681 + 139713818403600 = 112041^2 + 11820060^2 .

It is not a de Polignac number, because 139726371589281 - 2¹⁹ = 139726371064993 is a prime.

It is a super-2 number, since 2×139726371589281² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (139726371589081) by changing a digit.

It is a polite number, since it can be written in 134 ways as a sum of consecutive naturals, for example, 709270921675 + ... + 709270921871.

Almost surely, 2^{139726371589281} is an apocalyptic number.

139726371589281 is the 11820591-st square number.

139726371589281 is the 5910296-th centered octagonal number.

It is an amenable number.

139726371589281 is a deficient number, since it is larger than the sum of its proper divisors (75586926909160).

139726371589281 is an frugal number, since it uses more digits than its factorization.

139726371589281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 750 (or 372 counting only the distinct ones).

The product of its digits is 274337280, while the sum is 72.

The spelling of 139726371589281 in words is "one hundred thirty-nine trillion, seven hundred twenty-six billion, three hundred seventy-one million, five hundred eighty-nine thousand, two hundred eighty-one".