78213215554232 has 64 divisors (see below), whose sum is σ = 161499751983360. Its totient is φ = 35508260235360.

The previous prime is 78213215554147. The next prime is 78213215554247. The reversal of 78213215554232 is 23245551231287.

It is a super-2 number, since 2×78213215554232² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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, 4300763 + ... + 13225845.

It is an arithmetic number, because the mean of its divisors is an integer number (2523433624740).

Almost surely, 2^{78213215554232} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78213215554232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (80749875991680).

78213215554232 is an abundant number, since it is smaller than the sum of its proper divisors (83286536429128).

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

78213215554232 is a wasteful number, since it uses less digits than its factorization.

78213215554232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8925945 (or 8925919 counting only the distinct ones).

The product of its digits is 4032000, while the sum is 50.

The spelling of 78213215554232 in words is "seventy-eight trillion, two hundred thirteen billion, two hundred fifteen million, five hundred fifty-four thousand, two hundred thirty-two".