78190223449 has 16 divisors (see below), whose sum is σ = 85044668800. Its totient is φ = 71456121216.

The previous prime is 78190223437. The next prime is 78190223509. The reversal of 78190223449 is 94432209187.

It is a cyclic number.

It is not a de Polignac number, because 78190223449 - 2⁵ = 78190223417 is a prime.

It is a super-2 number, since 2×78190223449² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78190227449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9662197 + ... + 9670285.

It is an arithmetic number, because the mean of its divisors is an integer number (5315291800).

Almost surely, 2^78190223449 is an apocalyptic number.

It is an amenable number.

78190223449 is a deficient number, since it is larger than the sum of its proper divisors (6854445351).

78190223449 is a wasteful number, since it uses less digits than its factorization.

78190223449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15424.

The product of its (nonzero) digits is 870912, while the sum is 49.

The spelling of 78190223449 in words is "seventy-eight billion, one hundred ninety million, two hundred twenty-three thousand, four hundred forty-nine".