73765807409 has 16 divisors (see below), whose sum is σ = 86054131200. Its totient is φ = 63205884000.

The previous prime is 73765807393. The next prime is 73765807441. The reversal of 73765807409 is 90470856737.

It is not a de Polignac number, because 73765807409 - 2⁴ = 73765807393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (73765807909) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 993512 + ... + 1065174.

It is an arithmetic number, because the mean of its divisors is an integer number (5378383200).

Almost surely, 2^73765807409 is an apocalyptic number.

It is an amenable number.

73765807409 is a deficient number, since it is larger than the sum of its proper divisors (12288323791).

73765807409 is an equidigital number, since it uses as much as digits as its factorization.

73765807409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74685 (or 74671 counting only the distinct ones).

The product of its (nonzero) digits is 8890560, while the sum is 56.

The spelling of 73765807409 in words is "seventy-three billion, seven hundred sixty-five million, eight hundred seven thousand, four hundred nine".