78216115188058 has 32 divisors (see below), whose sum is σ = 121693374870480. Its totient is φ = 37676696893440.

The previous prime is 78216115188037. The next prime is 78216115188059. The reversal of 78216115188058 is 85088151161287.

It can be written as a sum of positive squares in 8 ways, for example, as 9833849994609 + 68382265193449 = 3135897^2 + 8269357^2 .

It is a super-3 number, since 3×78216115188058³ (a number of 43 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a junction number, because it is equal to n+sod(n) for n = 78216115187987 and 78216115188005.

It is not an unprimeable number, because it can be changed into a prime (78216115188059) 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, 1291035 + ... + 12573742.

Almost surely, 2^{78216115188058} is an apocalyptic number.

78216115188058 is a deficient number, since it is larger than the sum of its proper divisors (43477259682422).

78216115188058 is a wasteful number, since it uses less digits than its factorization.

78216115188058 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13865682.

The product of its (nonzero) digits is 8601600, while the sum is 61.

The spelling of 78216115188058 in words is "seventy-eight trillion, two hundred sixteen billion, one hundred fifteen million, one hundred eighty-eight thousand, fifty-eight".