78619689249 has 8 divisors (see below), whose sum is σ = 105358366080. Its totient is φ = 52147069296.

The previous prime is 78619689241. The next prime is 78619689259. The reversal of 78619689249 is 94298691687.

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

It is not a de Polignac number, because 78619689249 - 2³ = 78619689241 is a prime.

It is not an unprimeable number, because it can be changed into a prime (78619689241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66513529 + ... + 66514710.

It is an arithmetic number, because the mean of its divisors is an integer number (13169795760).

Almost surely, 2^78619689249 is an apocalyptic number.

It is an amenable number.

78619689249 is a deficient number, since it is larger than the sum of its proper divisors (26738676831).

78619689249 is a wasteful number, since it uses less digits than its factorization.

78619689249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133028439.

The product of its digits is 94058496, while the sum is 69.

The spelling of 78619689249 in words is "seventy-eight billion, six hundred nineteen million, six hundred eighty-nine thousand, two hundred forty-nine".