78532371617 has 8 divisors (see below), whose sum is σ = 89755216896. Its totient is φ = 67310510112.

The previous prime is 78532371613. The next prime is 78532371707. The reversal of 78532371617 is 71617323587.

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 78532371617 - 2² = 78532371613 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78532371613) 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, 66113 + ... + 401790.

It is an arithmetic number, because the mean of its divisors is an integer number (11219402112).

Almost surely, 2^78532371617 is an apocalyptic number.

It is an amenable number.

78532371617 is a deficient number, since it is larger than the sum of its proper divisors (11222845279).

78532371617 is a wasteful number, since it uses less digits than its factorization.

78532371617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 491887.

The product of its digits is 1481760, while the sum is 50.

The spelling of 78532371617 in words is "seventy-eight billion, five hundred thirty-two million, three hundred seventy-one thousand, six hundred seventeen".