78400863702084 has 192 divisors, whose sum is σ = 229633073252352. Its totient is φ = 20224887321600.

The previous prime is 78400863702047. The next prime is 78400863702121. The reversal of 78400863702084 is 48020736800487.

It is an interprime number because it is at equal distance from previous prime (78400863702047) and next prime (78400863702121).

It is a super-2 number, since 2×78400863702084² (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 63 ways as a sum of consecutive naturals, for example, 319462144 + ... + 319707464.

It is an arithmetic number, because the mean of its divisors is an integer number (1196005589856).

Almost surely, 2^{78400863702084} 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 78400863702084, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (114816536626176).

78400863702084 is an abundant number, since it is smaller than the sum of its proper divisors (151232209550268).

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

78400863702084 is a wasteful number, since it uses less digits than its factorization.

78400863702084 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 247706 (or 247704 counting only the distinct ones).

The product of its (nonzero) digits is 14450688, while the sum is 57.

The spelling of 78400863702084 in words is "seventy-eight trillion, four hundred billion, eight hundred sixty-three million, seven hundred two thousand, eighty-four".