73780272817 has 4 divisors (see below), whose sum is σ = 73782269440. Its totient is φ = 73778276196.

The previous prime is 73780272803. The next prime is 73780272821. The reversal of 73780272817 is 71827208737.

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: 71827208737 = 23 ⋅3122922119.

It is a cyclic number.

It is not a de Polignac number, because 73780272817 - 2¹¹ = 73780270769 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (73780872817) 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 in 3 ways as a sum of consecutive naturals, for example, 941817 + ... + 1017142.

It is an arithmetic number, because the mean of its divisors is an integer number (18445567360).

Almost surely, 2^73780272817 is an apocalyptic number.

It is an amenable number.

73780272817 is a deficient number, since it is larger than the sum of its proper divisors (1996623).

73780272817 is a wasteful number, since it uses less digits than its factorization.

73780272817 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1996622.

The product of its (nonzero) digits is 1843968, while the sum is 52.

The spelling of 73780272817 in words is "seventy-three billion, seven hundred eighty million, two hundred seventy-two thousand, eight hundred seventeen".