78213213646416 has 40 divisors (see below), whose sum is σ = 224500891023360. Its totient is φ = 26071071215328.

The previous prime is 78213213646361. The next prime is 78213213646439. The reversal of 78213213646416 is 61464631231287.

78213213646416 is a `hidden beast` number, since 7 + 8 + 2 + 1 + 3 + 213 + 6 + 4 + 6 + 416 = 666.

It is a super-2 number, since 2×78213213646416² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 90524552400 + ... + 90524553263.

It is an arithmetic number, because the mean of its divisors is an integer number (5612522275584).

Almost surely, 2^{78213213646416} is an apocalyptic number.

It is an amenable number.

78213213646416 is an abundant number, since it is smaller than the sum of its proper divisors (146287677376944).

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

78213213646416 is a wasteful number, since it uses less digits than its factorization.

78213213646416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181049105680 (or 181049105668 counting only the distinct ones).

The product of its digits is 6967296, while the sum is 54.

The spelling of 78213213646416 in words is "seventy-eight trillion, two hundred thirteen billion, two hundred thirteen million, six hundred forty-six thousand, four hundred sixteen".