1943200577081 has 2 divisors, whose sum is σ = 1943200577082. Its totient is φ = 1943200577080.

The previous prime is 1943200577069. The next prime is 1943200577173. The reversal of 1943200577081 is 1807750023491.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1407032481856 + 536168095225 = 1186184^2 + 732235^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1943200577081 is a prime.

It is a super-2 number, since 2×1943200577081² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1943200577041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 971600288540 + 971600288541.

It is an arithmetic number, because the mean of its divisors is an integer number (971600288541).

Almost surely, 2^{1943200577081} is an apocalyptic number.

It is an amenable number.

1943200577081 is a deficient number, since it is larger than the sum of its proper divisors (1).

1943200577081 is an equidigital number, since it uses as much as digits as its factorization.

1943200577081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 423360, while the sum is 47.

The spelling of 1943200577081 in words is "one trillion, nine hundred forty-three billion, two hundred million, five hundred seventy-seven thousand, eighty-one".