72489081589 has 2 divisors, whose sum is σ = 72489081590. Its totient is φ = 72489081588.

The previous prime is 72489081583. The next prime is 72489081629. The reversal of 72489081589 is 98518098427.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 71211591025 + 1277490564 = 266855^2 + 35742^2 .

It is a cyclic number.

It is not a de Polignac number, because 72489081589 - 2⁷ = 72489081461 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72489081583) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36244540794 + 36244540795.

It is an arithmetic number, because the mean of its divisors is an integer number (36244540795).

Almost surely, 2^72489081589 is an apocalyptic number.

It is an amenable number.

72489081589 is a deficient number, since it is larger than the sum of its proper divisors (1).

72489081589 is an equidigital number, since it uses as much as digits as its factorization.

72489081589 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11612160, while the sum is 61.

The spelling of 72489081589 in words is "seventy-two billion, four hundred eighty-nine million, eighty-one thousand, five hundred eighty-nine".