138147989446253 has 2 divisors, whose sum is σ = 138147989446254. Its totient is φ = 138147989446252.

The previous prime is 138147989446231. The next prime is 138147989446267. The reversal of 138147989446253 is 352644989741831.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 86487358820164 + 51660630626089 = 9299858^2 + 7187533^2 .

It is a cyclic number.

It is not a de Polignac number, because 138147989446253 - 2¹² = 138147989442157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (138147289446253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69073994723126 + 69073994723127.

It is an arithmetic number, because the mean of its divisors is an integer number (69073994723127).

Almost surely, 2^{138147989446253} is an apocalyptic number.

It is an amenable number.

138147989446253 is a deficient number, since it is larger than the sum of its proper divisors (1).

138147989446253 is an equidigital number, since it uses as much as digits as its factorization.

138147989446253 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1254113280, while the sum is 74.

The spelling of 138147989446253 in words is "one hundred thirty-eight trillion, one hundred forty-seven billion, nine hundred eighty-nine million, four hundred forty-six thousand, two hundred fifty-three".