1945503408377 has 2 divisors, whose sum is σ = 1945503408378. Its totient is φ = 1945503408376.

The previous prime is 1945503408367. The next prime is 1945503408379. The reversal of 1945503408377 is 7738043055491.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1930643554576 + 14859853801 = 1389476^2 + 121901^2 .

It is a cyclic number.

It is not a de Polignac number, because 1945503408377 - 2⁴ = 1945503408361 is a prime.

Together with 1945503408379, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1945503408379) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 972751704188 + 972751704189.

It is an arithmetic number, because the mean of its divisors is an integer number (972751704189).

Almost surely, 2^{1945503408377} is an apocalyptic number.

It is an amenable number.

1945503408377 is a deficient number, since it is larger than the sum of its proper divisors (1).

1945503408377 is an equidigital number, since it uses as much as digits as its factorization.

1945503408377 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12700800, while the sum is 56.

The spelling of 1945503408377 in words is "one trillion, nine hundred forty-five billion, five hundred three million, four hundred eight thousand, three hundred seventy-seven".