80983499749 has 2 divisors, whose sum is σ = 80983499750. Its totient is φ = 80983499748.

The previous prime is 80983499741. The next prime is 80983499809. The reversal of 80983499749 is 94799438908.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 61798479649 + 19185020100 = 248593^2 + 138510^2 .

It is a cyclic number.

It is not a de Polignac number, because 80983499749 - 2³ = 80983499741 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (80983499741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40491749874 + 40491749875.

It is an arithmetic number, because the mean of its divisors is an integer number (40491749875).

Almost surely, 2^80983499749 is an apocalyptic number.

It is an amenable number.

80983499749 is a deficient number, since it is larger than the sum of its proper divisors (1).

80983499749 is an equidigital number, since it uses as much as digits as its factorization.

80983499749 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 141087744, while the sum is 70.

The spelling of 80983499749 in words is "eighty billion, nine hundred eighty-three million, four hundred ninety-nine thousand, seven hundred forty-nine".