78342705336247 has 8 divisors (see below), whose sum is σ = 86137720399872. Its totient is φ = 70659848763000.

The previous prime is 78342705336221. The next prime is 78342705336253. The reversal of 78342705336247 is 74263350724387.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78342705336247 is a prime.

It is a super-2 number, since 2×78342705336247² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78342705736247) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28039621129 + ... + 28039623922.

It is an arithmetic number, because the mean of its divisors is an integer number (10767215049984).

Almost surely, 2^{78342705336247} is an apocalyptic number.

78342705336247 is a deficient number, since it is larger than the sum of its proper divisors (7795015063625).

78342705336247 is a wasteful number, since it uses less digits than its factorization.

78342705336247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56079245189.

The product of its (nonzero) digits is 142248960, while the sum is 61.

The spelling of 78342705336247 in words is "seventy-eight trillion, three hundred forty-two billion, seven hundred five million, three hundred thirty-six thousand, two hundred forty-seven".