80923852781 has 2 divisors, whose sum is σ = 80923852782. Its totient is φ = 80923852780.

The previous prime is 80923852759. The next prime is 80923852913. The reversal of 80923852781 is 18725832908.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 80490796681 + 433056100 = 283709^2 + 20810^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-80923852781 is a prime.

It is a super-2 number, since 2×80923852781² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (80923852741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40461926390 + 40461926391.

It is an arithmetic number, because the mean of its divisors is an integer number (40461926391).

Almost surely, 2^80923852781 is an apocalyptic number.

It is an amenable number.

80923852781 is a deficient number, since it is larger than the sum of its proper divisors (1).

80923852781 is an equidigital number, since it uses as much as digits as its factorization.

80923852781 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1935360, while the sum is 53.

The spelling of 80923852781 in words is "eighty billion, nine hundred twenty-three million, eight hundred fifty-two thousand, seven hundred eighty-one".