78330257778286 has 8 divisors (see below), whose sum is σ = 117496112080320. Its totient is φ = 39164887084848.

The previous prime is 78330257778239. The next prime is 78330257778299. The reversal of 78330257778286 is 68287775203387.

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

It is a super-2 number, since 2×78330257778286² (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 3 ways as a sum of consecutive naturals, for example, 120496951 + ... + 121145266.

It is an arithmetic number, because the mean of its divisors is an integer number (14687014010040).

Almost surely, 2^{78330257778286} is an apocalyptic number.

78330257778286 is a deficient number, since it is larger than the sum of its proper divisors (39165854302034).

78330257778286 is a wasteful number, since it uses less digits than its factorization.

78330257778286 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 241804298.

The product of its (nonzero) digits is 1327656960, while the sum is 73.

The spelling of 78330257778286 in words is "seventy-eight trillion, three hundred thirty billion, two hundred fifty-seven million, seven hundred seventy-eight thousand, two hundred eighty-six".