2159245481977 has 2 divisors, whose sum is σ = 2159245481978. Its totient is φ = 2159245481976.

The previous prime is 2159245481957. The next prime is 2159245482013. The reversal of 2159245481977 is 7791845429512.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2116265558121 + 42979923856 = 1454739^2 + 207316^2 .

It is a cyclic number.

It is not a de Polignac number, because 2159245481977 - 2¹⁹ = 2159244957689 is a prime.

It is not a weakly prime, because it can be changed into another prime (2159245481917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1079622740988 + 1079622740989.

It is an arithmetic number, because the mean of its divisors is an integer number (1079622740989).

Almost surely, 2^{2159245481977} is an apocalyptic number.

It is an amenable number.

2159245481977 is a deficient number, since it is larger than the sum of its proper divisors (1).

2159245481977 is an equidigital number, since it uses as much as digits as its factorization.

2159245481977 is an evil number, because the sum of its binary digits is even.

The product of its digits is 50803200, while the sum is 64.

The spelling of 2159245481977 in words is "two trillion, one hundred fifty-nine billion, two hundred forty-five million, four hundred eighty-one thousand, nine hundred seventy-seven".