2945145861257 has 2 divisors, whose sum is σ = 2945145861258. Its totient is φ = 2945145861256.

The previous prime is 2945145861241. The next prime is 2945145861289. The reversal of 2945145861257 is 7521685415492.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2280172480576 + 664973380681 = 1510024^2 + 815459^2 .

It is a cyclic number.

It is not a de Polignac number, because 2945145861257 - 2⁴ = 2945145861241 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2945145861196 and 2945145861205.

It is not a weakly prime, because it can be changed into another prime (2945145461257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1472572930628 + 1472572930629.

It is an arithmetic number, because the mean of its divisors is an integer number (1472572930629).

Almost surely, 2^{2945145861257} is an apocalyptic number.

It is an amenable number.

2945145861257 is a deficient number, since it is larger than the sum of its proper divisors (1).

2945145861257 is an equidigital number, since it uses as much as digits as its factorization.

2945145861257 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 24192000, while the sum is 59.

The spelling of 2945145861257 in words is "two trillion, nine hundred forty-five billion, one hundred forty-five million, eight hundred sixty-one thousand, two hundred fifty-seven".