78829865371 has 4 divisors (see below), whose sum is σ = 78833771392. Its totient is φ = 78825959352.

The previous prime is 78829865341. The next prime is 78829865407. The reversal of 78829865371 is 17356892887.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 17356892887 = 139 ⋅124869733.

It is a cyclic number.

It is not a de Polignac number, because 78829865371 - 2¹¹ = 78829863323 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78829865341) 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, 1922580 + ... + 1963153.

It is an arithmetic number, because the mean of its divisors is an integer number (19708442848).

Almost surely, 2^78829865371 is an apocalyptic number.

78829865371 is a deficient number, since it is larger than the sum of its proper divisors (3906021).

78829865371 is a wasteful number, since it uses less digits than its factorization.

78829865371 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3906020.

The product of its digits is 40642560, while the sum is 64.

The spelling of 78829865371 in words is "seventy-eight billion, eight hundred twenty-nine million, eight hundred sixty-five thousand, three hundred seventy-one".