78930555019 has 4 divisors (see below), whose sum is σ = 78931746160. Its totient is φ = 78929363880.

The previous prime is 78930555013. The next prime is 78930555037. The reversal of 78930555019 is 91055503987.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 78930555019 - 2⁵ = 78930554987 is a prime.

It is a super-2 number, since 2×78930555019² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78930555013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 489927 + ... + 630784.

It is an arithmetic number, because the mean of its divisors is an integer number (19732936540).

Almost surely, 2^78930555019 is an apocalyptic number.

78930555019 is a deficient number, since it is larger than the sum of its proper divisors (1191141).

78930555019 is a wasteful number, since it uses less digits than its factorization.

78930555019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1191140.

The product of its (nonzero) digits is 1701000, while the sum is 52.

The spelling of 78930555019 in words is "seventy-eight billion, nine hundred thirty million, five hundred fifty-five thousand, nineteen".