3845651783977 has 2 divisors, whose sum is σ = 3845651783978. Its totient is φ = 3845651783976.

The previous prime is 3845651783969. The next prime is 3845651784133. The reversal of 3845651783977 is 7793871565483.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2624105168281 + 1221546615696 = 1619909^2 + 1105236^2 .

It is an emirp because it is prime and its reverse (7793871565483) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3845651783977 - 2³ = 3845651783969 is a prime.

It is not a weakly prime, because it can be changed into another prime (3845651783377) 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, 1922825891988 + 1922825891989.

It is an arithmetic number, because the mean of its divisors is an integer number (1922825891989).

Almost surely, 2^{3845651783977} is an apocalyptic number.

It is an amenable number.

3845651783977 is a deficient number, since it is larger than the sum of its proper divisors (1).

3845651783977 is an equidigital number, since it uses as much as digits as its factorization.

3845651783977 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1066867200, while the sum is 73.

The spelling of 3845651783977 in words is "three trillion, eight hundred forty-five billion, six hundred fifty-one million, seven hundred eighty-three thousand, nine hundred seventy-seven".