1378534223401 has 2 divisors, whose sum is σ = 1378534223402. Its totient is φ = 1378534223400.

The previous prime is 1378534223369. The next prime is 1378534223449. The reversal of 1378534223401 is 1043224358731.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1112231781376 + 266302442025 = 1054624^2 + 516045^2 .

It is an emirp because it is prime and its reverse (1043224358731) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1378534223401 - 2⁵ = 1378534223369 is a prime.

It is not a weakly prime, because it can be changed into another prime (1378534227401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 689267111700 + 689267111701.

It is an arithmetic number, because the mean of its divisors is an integer number (689267111701).

Almost surely, 2^{1378534223401} is an apocalyptic number.

It is an amenable number.

1378534223401 is a deficient number, since it is larger than the sum of its proper divisors (1).

1378534223401 is an equidigital number, since it uses as much as digits as its factorization.

1378534223401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 483840, while the sum is 43.

The spelling of 1378534223401 in words is "one trillion, three hundred seventy-eight billion, five hundred thirty-four million, two hundred twenty-three thousand, four hundred one".