78332538399 has 16 divisors (see below), whose sum is σ = 104722675200. Its totient is φ = 52082222976.

The previous prime is 78332538379. The next prime is 78332538433. The reversal of 78332538399 is 99383523387.

It is a happy number.

It is not a de Polignac number, because 78332538399 - 2⁵ = 78332538367 is a prime.

It is a super-2 number, since 2×78332538399² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78332538329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1827192 + ... + 1869570.

It is an arithmetic number, because the mean of its divisors is an integer number (6545167200).

Almost surely, 2^78332538399 is an apocalyptic number.

78332538399 is a deficient number, since it is larger than the sum of its proper divisors (26390136801).

78332538399 is a wasteful number, since it uses less digits than its factorization.

78332538399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44014.

The product of its digits is 29393280, while the sum is 60.

The spelling of 78332538399 in words is "seventy-eight billion, three hundred thirty-two million, five hundred thirty-eight thousand, three hundred ninety-nine".