78216067301658 has 192 divisors, whose sum is σ = 185312010522240. Its totient is φ = 21816893030400.

The previous prime is 78216067301627. The next prime is 78216067301677. The reversal of 78216067301658 is 85610376061287.

It is a super-2 number, since 2×78216067301658² (a number of 29 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 15073434928 + ... + 15073440116.

It is an arithmetic number, because the mean of its divisors is an integer number (965166721470).

Almost surely, 2^{78216067301658} is an apocalyptic number.

78216067301658 is a gapful number since it is divisible by the number (78) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 78216067301658, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (92656005261120).

78216067301658 is an abundant number, since it is smaller than the sum of its proper divisors (107095943220582).

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

78216067301658 is a wasteful number, since it uses less digits than its factorization.

78216067301658 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8785 (or 8772 counting only the distinct ones).

The product of its (nonzero) digits is 20321280, while the sum is 60.

The spelling of 78216067301658 in words is "seventy-eight trillion, two hundred sixteen billion, sixty-seven million, three hundred one thousand, six hundred fifty-eight".