80818761943 has 2 divisors, whose sum is σ = 80818761944. Its totient is φ = 80818761942.

The previous prime is 80818761917. The next prime is 80818761971. The reversal of 80818761943 is 34916781808.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-80818761943 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (80818761983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40409380971 + 40409380972.

It is an arithmetic number, because the mean of its divisors is an integer number (40409380972).

Almost surely, 2^80818761943 is an apocalyptic number.

80818761943 is a deficient number, since it is larger than the sum of its proper divisors (1).

80818761943 is an equidigital number, since it uses as much as digits as its factorization.

80818761943 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2322432, while the sum is 55.

The spelling of 80818761943 in words is "eighty billion, eight hundred eighteen million, seven hundred sixty-one thousand, nine hundred forty-three".