78749711115 has 8 divisors (see below), whose sum is σ = 125999537808. Its totient is φ = 41999845920.

The previous prime is 78749711081. The next prime is 78749711189. The reversal of 78749711115 is 51111794787.

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

It is not a de Polignac number, because 78749711115 - 2¹¹ = 78749709067 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2624990356 + ... + 2624990385.

It is an arithmetic number, because the mean of its divisors is an integer number (15749942226).

Almost surely, 2^78749711115 is an apocalyptic number.

78749711115 is a deficient number, since it is larger than the sum of its proper divisors (47249826693).

78749711115 is a wasteful number, since it uses less digits than its factorization.

78749711115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5249980749.

The product of its digits is 493920, while the sum is 51.

The spelling of 78749711115 in words is "seventy-eight billion, seven hundred forty-nine million, seven hundred eleven thousand, one hundred fifteen".