78280342467218 has 8 divisors (see below), whose sum is σ = 121469496931980. Its totient is φ = 37790510156560.

The previous prime is 78280342467209. The next prime is 78280342467233. The reversal of 78280342467218 is 81276424308287.

It can be written as a sum of positive squares in 2 ways, for example, as 72628012150849 + 5652330316369 = 8522207^2 + 2377463^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×78280342467218² (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, 674830538453 + ... + 674830538568.

Almost surely, 2^{78280342467218} is an apocalyptic number.

78280342467218 is a deficient number, since it is larger than the sum of its proper divisors (43189154464762).

78280342467218 is a wasteful number, since it uses less digits than its factorization.

78280342467218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1349661077052.

The product of its (nonzero) digits is 57802752, while the sum is 62.

The spelling of 78280342467218 in words is "seventy-eight trillion, two hundred eighty billion, three hundred forty-two million, four hundred sixty-seven thousand, two hundred eighteen".