78213723465558 has 8 divisors (see below), whose sum is σ = 156427446931128. Its totient is φ = 26071241155184.

The previous prime is 78213723465533. The next prime is 78213723465623. The reversal of 78213723465558 is 85556432731287.

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

78213723465558 is an admirable number.

It is a super-3 number, since 3×78213723465558³ (a number of 43 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6517810288791 + ... + 6517810288802.

It is an arithmetic number, because the mean of its divisors is an integer number (19553430866391).

Almost surely, 2^{78213723465558} is an apocalyptic number.

78213723465558 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

78213723465558 is a wasteful number, since it uses less digits than its factorization.

78213723465558 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13035620577598.

The product of its digits is 338688000, while the sum is 66.

The spelling of 78213723465558 in words is "seventy-eight trillion, two hundred thirteen billion, seven hundred twenty-three million, four hundred sixty-five thousand, five hundred fifty-eight".