1378625855489 has 2 divisors, whose sum is σ = 1378625855490. Its totient is φ = 1378625855488.

The previous prime is 1378625855419. The next prime is 1378625855527. The reversal of 1378625855489 is 9845585268731.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1053891134464 + 324734721025 = 1026592^2 + 569855^2 .

It is a cyclic number.

It is not a de Polignac number, because 1378625855489 - 2¹⁶ = 1378625789953 is a prime.

It is a super-2 number, since 2×1378625855489² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1378625855419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 689312927744 + 689312927745.

It is an arithmetic number, because the mean of its divisors is an integer number (689312927745).

Almost surely, 2^{1378625855489} is an apocalyptic number.

It is an amenable number.

1378625855489 is a deficient number, since it is larger than the sum of its proper divisors (1).

1378625855489 is an equidigital number, since it uses as much as digits as its factorization.

1378625855489 is an evil number, because the sum of its binary digits is even.

The product of its digits is 580608000, while the sum is 71.

The spelling of 1378625855489 in words is "one trillion, three hundred seventy-eight billion, six hundred twenty-five million, eight hundred fifty-five thousand, four hundred eighty-nine".