78658675099 has 4 divisors (see below), whose sum is σ = 78860882880. Its totient is φ = 78456467320.

The previous prime is 78658675093. The next prime is 78658675129. The reversal of 78658675099 is 99057685687.

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 78658675099 - 2¹³ = 78658666907 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78658675093) 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, 101103307 + ... + 101104084.

It is an arithmetic number, because the mean of its divisors is an integer number (19715220720).

Almost surely, 2^78658675099 is an apocalyptic number.

78658675099 is a deficient number, since it is larger than the sum of its proper divisors (202207781).

78658675099 is a wasteful number, since it uses less digits than its factorization.

78658675099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202207780.

The product of its (nonzero) digits is 228614400, while the sum is 70.

The spelling of 78658675099 in words is "seventy-eight billion, six hundred fifty-eight million, six hundred seventy-five thousand, ninety-nine".