78446446469 has 4 divisors (see below), whose sum is σ = 78469076544. Its totient is φ = 78423816396.

The previous prime is 78446446457. The next prime is 78446446499. The reversal of 78446446469 is 96464464487.

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 78446446469 - 2⁴ = 78446446453 is a prime.

It is a super-2 number, since 2×78446446469² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78446446499) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11309837 + ... + 11316770.

It is an arithmetic number, because the mean of its divisors is an integer number (19617269136).

Almost surely, 2^78446446469 is an apocalyptic number.

It is an amenable number.

78446446469 is a deficient number, since it is larger than the sum of its proper divisors (22630075).

78446446469 is a wasteful number, since it uses less digits than its factorization.

78446446469 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22630074.

The product of its digits is 111476736, while the sum is 62.

The spelling of 78446446469 in words is "seventy-eight billion, four hundred forty-six million, four hundred forty-six thousand, four hundred sixty-nine".