13851370958449 has 2 divisors, whose sum is σ = 13851370958450. Its totient is φ = 13851370958448.

The previous prime is 13851370958431. The next prime is 13851370958533. The reversal of 13851370958449 is 94485907315831.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13851370958049 + 400 = 3721743^2 + 20^2 .

It is a cyclic number.

It is not a de Polignac number, because 13851370958449 - 2¹³ = 13851370950257 is a prime.

It is not a weakly prime, because it can be changed into another prime (13851370958429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6925685479224 + 6925685479225.

It is an arithmetic number, because the mean of its divisors is an integer number (6925685479225).

Almost surely, 2^{13851370958449} is an apocalyptic number.

It is an amenable number.

13851370958449 is a deficient number, since it is larger than the sum of its proper divisors (1).

13851370958449 is an equidigital number, since it uses as much as digits as its factorization.

13851370958449 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 130636800, while the sum is 67.

The spelling of 13851370958449 in words is "thirteen trillion, eight hundred fifty-one billion, three hundred seventy million, nine hundred fifty-eight thousand, four hundred forty-nine".