78687223617 has 8 divisors (see below), whose sum is σ = 104918688000. Its totient is φ = 52456954160.

The previous prime is 78687223613. The next prime is 78687223633. The reversal of 78687223617 is 71632278687.

It is a happy number.

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 78687223617 - 2² = 78687223613 is a prime.

It is not an unprimeable number, because it can be changed into a prime (78687223613) by changing a digit.

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, 131742 + ... + 418007.

It is an arithmetic number, because the mean of its divisors is an integer number (13114836000).

Almost surely, 2^78687223617 is an apocalyptic number.

It is an amenable number.

78687223617 is a deficient number, since it is larger than the sum of its proper divisors (26231464383).

78687223617 is a wasteful number, since it uses less digits than its factorization.

78687223617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 597463.

The product of its digits is 9483264, while the sum is 57.

The spelling of 78687223617 in words is "seventy-eight billion, six hundred eighty-seven million, two hundred twenty-three thousand, six hundred seventeen".