1378170805357 has 2 divisors, whose sum is σ = 1378170805358. Its totient is φ = 1378170805356.

The previous prime is 1378170805303. The next prime is 1378170805367. The reversal of 1378170805357 is 7535080718731.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1237676275081 + 140494530276 = 1112509^2 + 374826^2 .

It is a cyclic number.

It is not a de Polignac number, because 1378170805357 - 2¹¹ = 1378170803309 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1378170805298 and 1378170805307.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1378170805367) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 689085402678 + 689085402679.

It is an arithmetic number, because the mean of its divisors is an integer number (689085402679).

Almost surely, 2^{1378170805357} is an apocalyptic number.

It is an amenable number.

1378170805357 is a deficient number, since it is larger than the sum of its proper divisors (1).

1378170805357 is an equidigital number, since it uses as much as digits as its factorization.

1378170805357 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4939200, while the sum is 55.

The spelling of 1378170805357 in words is "one trillion, three hundred seventy-eight billion, one hundred seventy million, eight hundred five thousand, three hundred fifty-seven".