78242320171288 has 64 divisors (see below), whose sum is σ = 184244082120000. Its totient is φ = 30953005767936.

The previous prime is 78242320171271. The next prime is 78242320171291. The reversal of 78242320171288 is 88217102324287.

It is a super-2 number, since 2×78242320171288² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1096655293 + ... + 1096726636.

It is an arithmetic number, because the mean of its divisors is an integer number (2878813783125).

Almost surely, 2^{78242320171288} is an apocalyptic number.

It is an amenable number.

78242320171288 is an abundant number, since it is smaller than the sum of its proper divisors (106001761948712).

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

78242320171288 is a wasteful number, since it uses less digits than its factorization.

78242320171288 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2193381969 (or 2193381951 counting only the distinct ones).

The product of its (nonzero) digits is 4816896, while the sum is 55.

The spelling of 78242320171288 in words is "seventy-eight trillion, two hundred forty-two billion, three hundred twenty million, one hundred seventy-one thousand, two hundred eighty-eight".