78300744809 has 4 divisors (see below), whose sum is σ = 89486565504. Its totient is φ = 67114924116.

The previous prime is 78300744763. The next prime is 78300744817. The reversal of 78300744809 is 90844700387.

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: 90844700387 = 7 ⋅12977814341.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78300744809 is a prime.

It is a super-2 number, since 2×78300744809² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78300744869) 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, 5592910337 + ... + 5592910350.

It is an arithmetic number, because the mean of its divisors is an integer number (22371641376).

Almost surely, 2^78300744809 is an apocalyptic number.

It is an amenable number.

78300744809 is a deficient number, since it is larger than the sum of its proper divisors (11185820695).

78300744809 is a wasteful number, since it uses less digits than its factorization.

78300744809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11185820694.

The product of its (nonzero) digits is 1354752, while the sum is 50.

The spelling of 78300744809 in words is "seventy-eight billion, three hundred million, seven hundred forty-four thousand, eight hundred nine".