73766381589 has 40 divisors (see below), whose sum is σ = 116977025880. Its totient is φ = 46165469184.

The previous prime is 73766381567. The next prime is 73766381639. The reversal of 73766381589 is 98518366737.

It can be written as a sum of positive squares in 4 ways, for example, as 2979522225 + 70786859364 = 54585^2 + 266058^2 .

It is not a de Polignac number, because 73766381589 - 2⁷ = 73766381461 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73766381089) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 466797 + ... + 604509.

It is an arithmetic number, because the mean of its divisors is an integer number (2924425647).

Almost surely, 2^73766381589 is an apocalyptic number.

It is an amenable number.

73766381589 is a deficient number, since it is larger than the sum of its proper divisors (43210644291).

73766381589 is a wasteful number, since it uses less digits than its factorization.

73766381589 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138131 (or 138122 counting only the distinct ones).

The product of its digits is 45722880, while the sum is 63.

The spelling of 73766381589 in words is "seventy-three billion, seven hundred sixty-six million, three hundred eighty-one thousand, five hundred eighty-nine".