138145395266 has 8 divisors (see below), whose sum is σ = 207712648080. Its totient is φ = 68907845908.

The previous prime is 138145395253. The next prime is 138145395277. The reversal of 138145395266 is 662593541831.

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

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 82424816 + ... + 82426491.

It is an arithmetic number, because the mean of its divisors is an integer number (25964081010).

Almost surely, 2^138145395266 is an apocalyptic number.

138145395266 is a deficient number, since it is larger than the sum of its proper divisors (69567252814).

138145395266 is a wasteful number, since it uses less digits than its factorization.

138145395266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164851728.

The product of its digits is 4665600, while the sum is 53.

The spelling of 138145395266 in words is "one hundred thirty-eight billion, one hundred forty-five million, three hundred ninety-five thousand, two hundred sixty-six".