138647746331 has 2 divisors, whose sum is σ = 138647746332. Its totient is φ = 138647746330.

The previous prime is 138647746327. The next prime is 138647746403. The reversal of 138647746331 is 133647746831.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 138647746331 - 2² = 138647746327 is a prime.

It is a super-2 number, since 2×138647746331² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (138647046331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69323873165 + 69323873166.

It is an arithmetic number, because the mean of its divisors is an integer number (69323873166).

Almost surely, 2^138647746331 is an apocalyptic number.

138647746331 is a deficient number, since it is larger than the sum of its proper divisors (1).

138647746331 is an equidigital number, since it uses as much as digits as its factorization.

138647746331 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6096384, while the sum is 53.

The spelling of 138647746331 in words is "one hundred thirty-eight billion, six hundred forty-seven million, seven hundred forty-six thousand, three hundred thirty-one".