78218374171016 has 16 divisors (see below), whose sum is σ = 147814250403840. Its totient is φ = 38801240730000.

The previous prime is 78218374170997. The next prime is 78218374171031. The reversal of 78218374171016 is 61017147381287.

It is a super-2 number, since 2×78218374171016² (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 3 ways as a sum of consecutive naturals, for example, 38493293360 + ... + 38493295391.

It is an arithmetic number, because the mean of its divisors is an integer number (9238390650240).

Almost surely, 2^{78218374171016} is an apocalyptic number.

It is an amenable number.

78218374171016 is a deficient number, since it is larger than the sum of its proper divisors (69595876232824).

78218374171016 is a wasteful number, since it uses less digits than its factorization.

78218374171016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76986588884 (or 76986588880 counting only the distinct ones).

The product of its (nonzero) digits is 3161088, while the sum is 56.

The spelling of 78218374171016 in words is "seventy-eight trillion, two hundred eighteen billion, three hundred seventy-four million, one hundred seventy-one thousand, sixteen".