78921165063 has 8 divisors (see below), whose sum is σ = 113322698608. Its totient is φ = 48566870784.

The previous prime is 78921165053. The next prime is 78921165067. The reversal of 78921165063 is 36056112987.

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

It is not a de Polignac number, because 78921165063 - 2²¹ = 78919067911 is a prime.

It is a super-3 number, since 3×78921165063³ (a number of 34 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78921165067) 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, 1011809770 + ... + 1011809847.

It is an arithmetic number, because the mean of its divisors is an integer number (14165337326).

Almost surely, 2^78921165063 is an apocalyptic number.

78921165063 is a deficient number, since it is larger than the sum of its proper divisors (34401533545).

78921165063 is a wasteful number, since it uses less digits than its factorization.

78921165063 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2023619633.

The product of its (nonzero) digits is 544320, while the sum is 48.

The spelling of 78921165063 in words is "seventy-eight billion, nine hundred twenty-one million, one hundred sixty-five thousand, sixty-three".