138564593249 has 8 divisors (see below), whose sum is σ = 142765410792. Its totient is φ = 134426010240.

The previous prime is 138564593221. The next prime is 138564593269. The reversal of 138564593249 is 942395465831.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 13117579024 + 125447014225 = 114532^2 + 354185^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 138564593249 - 2³⁶ = 69845116513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138564593269) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15554114 + ... + 15563019.

It is an arithmetic number, because the mean of its divisors is an integer number (17845676349).

Almost surely, 2^138564593249 is an apocalyptic number.

It is an amenable number.

138564593249 is a deficient number, since it is larger than the sum of its proper divisors (4200817543).

138564593249 is an equidigital number, since it uses as much as digits as its factorization.

138564593249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31117267.

The product of its digits is 27993600, while the sum is 59.

The spelling of 138564593249 in words is "one hundred thirty-eight billion, five hundred sixty-four million, five hundred ninety-three thousand, two hundred forty-nine".