78696268819 has 4 divisors (see below), whose sum is σ = 89938592944. Its totient is φ = 67453944696.

The previous prime is 78696268801. The next prime is 78696268823. The reversal of 78696268819 is 91886269687.

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 78696268819 - 2⁹ = 78696268307 is a prime.

It is a super-2 number, since 2×78696268819² (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 (78696268219) 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, 5621162052 + ... + 5621162065.

It is an arithmetic number, because the mean of its divisors is an integer number (22484648236).

Almost surely, 2^78696268819 is an apocalyptic number.

78696268819 is a deficient number, since it is larger than the sum of its proper divisors (11242324125).

78696268819 is a wasteful number, since it uses less digits than its factorization.

78696268819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11242324124.

The product of its digits is 125411328, while the sum is 70.

The spelling of 78696268819 in words is "seventy-eight billion, six hundred ninety-six million, two hundred sixty-eight thousand, eight hundred nineteen".