78000099099 has 64 divisors (see below), whose sum is σ = 120538091520. Its totient is φ = 44513763840.

The previous prime is 78000099097. The next prime is 78000099181. The reversal of 78000099099 is 99099000087.

It is not a de Polignac number, because 78000099099 - 2¹ = 78000099097 is a prime.

It is a super-2 number, since 2×78000099099² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78000099097) 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 63 ways as a sum of consecutive naturals, for example, 2741157 + ... + 2769465.

It is an arithmetic number, because the mean of its divisors is an integer number (1883407680).

Almost surely, 2^78000099099 is an apocalyptic number.

78000099099 is a deficient number, since it is larger than the sum of its proper divisors (42537992421).

78000099099 is a wasteful number, since it uses less digits than its factorization.

78000099099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28452.

The product of its (nonzero) digits is 367416, while the sum is 51.

The spelling of 78000099099 in words is "seventy-eight billion, ninety-nine thousand, ninety-nine".