72800379989 has 2 divisors, whose sum is σ = 72800379990. Its totient is φ = 72800379988.

The previous prime is 72800379961. The next prime is 72800380021. The reversal of 72800379989 is 98997300827.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 59953971025 + 12846408964 = 244855^2 + 113342^2 .

It is a cyclic number.

It is not a de Polignac number, because 72800379989 - 2⁸ = 72800379733 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72800379929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36400189994 + 36400189995.

It is an arithmetic number, because the mean of its divisors is an integer number (36400189995).

Almost surely, 2^72800379989 is an apocalyptic number.

It is an amenable number.

72800379989 is a deficient number, since it is larger than the sum of its proper divisors (1).

72800379989 is an equidigital number, since it uses as much as digits as its factorization.

72800379989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13716864, while the sum is 62.

The spelling of 72800379989 in words is "seventy-two billion, eight hundred million, three hundred seventy-nine thousand, nine hundred eighty-nine".