73396844821 has 4 divisors (see below), whose sum is σ = 74640859200. Its totient is φ = 72152830444.

The previous prime is 73396844813. The next prime is 73396844849. The reversal of 73396844821 is 12844869337.

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.

It is a cyclic number.

It is not a de Polignac number, because 73396844821 - 2³ = 73396844813 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73396844891) 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, 622007101 + ... + 622007218.

It is an arithmetic number, because the mean of its divisors is an integer number (18660214800).

Almost surely, 2^73396844821 is an apocalyptic number.

It is an amenable number.

73396844821 is a deficient number, since it is larger than the sum of its proper divisors (1244014379).

73396844821 is a wasteful number, since it uses less digits than its factorization.

73396844821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1244014378.

The product of its digits is 6967296, while the sum is 55.

The spelling of 73396844821 in words is "seventy-three billion, three hundred ninety-six million, eight hundred forty-four thousand, eight hundred twenty-one".