78691288123 has 8 divisors (see below), whose sum is σ = 91164858848. Its totient is φ = 66525706944.

The previous prime is 78691288103. The next prime is 78691288129. The reversal of 78691288123 is 32188219687.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78691288123 is a prime.

It is not an unprimeable number, because it can be changed into a prime (78691288129) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 76996836 + ... + 76997857.

It is an arithmetic number, because the mean of its divisors is an integer number (11395607356).

Almost surely, 2^78691288123 is an apocalyptic number.

78691288123 is a gapful number since it is divisible by the number (73) formed by its first and last digit.

78691288123 is a deficient number, since it is larger than the sum of its proper divisors (12473570725).

78691288123 is a wasteful number, since it uses less digits than its factorization.

78691288123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153994773.

The product of its digits is 2322432, while the sum is 55.

The spelling of 78691288123 in words is "seventy-eight billion, six hundred ninety-one million, two hundred eighty-eight thousand, one hundred twenty-three".