73391356409 has 4 divisors (see below), whose sum is σ = 83875835904. Its totient is φ = 62906876916.

The previous prime is 73391356399. The next prime is 73391356417. The reversal of 73391356409 is 90465319337.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 90465319337 = 13121 ⋅6894697.

It is a cyclic number.

It is not a de Polignac number, because 73391356409 - 2¹² = 73391352313 is a prime.

It is not an unprimeable number, because it can be changed into a prime (73391356429) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5242239737 + ... + 5242239750.

It is an arithmetic number, because the mean of its divisors is an integer number (20968958976).

Almost surely, 2^73391356409 is an apocalyptic number.

It is an amenable number.

73391356409 is a deficient number, since it is larger than the sum of its proper divisors (10484479495).

73391356409 is a wasteful number, since it uses less digits than its factorization.

73391356409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10484479494.

The product of its (nonzero) digits is 1837080, while the sum is 50.

The spelling of 73391356409 in words is "seventy-three billion, three hundred ninety-one million, three hundred fifty-six thousand, four hundred nine".