78397719115 has 8 divisors (see below), whose sum is σ = 94426994160. Its totient is φ = 62485021152.

The previous prime is 78397719083. The next prime is 78397719121. The reversal of 78397719115 is 51191779387.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 78397719115 - 2⁵ = 78397719083 is a prime.

It is a super-2 number, since 2×78397719115² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 78397719115.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29142789 + ... + 29145478.

It is an arithmetic number, because the mean of its divisors is an integer number (11803374270).

Almost surely, 2^78397719115 is an apocalyptic number.

78397719115 is a deficient number, since it is larger than the sum of its proper divisors (16029275045).

78397719115 is a wasteful number, since it uses less digits than its factorization.

78397719115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58288541.

The product of its digits is 3333960, while the sum is 58.

The spelling of 78397719115 in words is "seventy-eight billion, three hundred ninety-seven million, seven hundred nineteen thousand, one hundred fifteen".