78216344155247 has 8 divisors (see below), whose sum is σ = 78395387426400. Its totient is φ = 78037304857344.

The previous prime is 78216344155237. The next prime is 78216344155259. The reversal of 78216344155247 is 74255144361287.

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

It is a cyclic number.

It is not a de Polignac number, because 78216344155247 - 2⁴ = 78216344155231 is a prime.

It is a super-2 number, since 2×78216344155247² (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 (78216344155217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40394183 + ... + 42286199.

It is an arithmetic number, because the mean of its divisors is an integer number (9799423428300).

Almost surely, 2^{78216344155247} is an apocalyptic number.

78216344155247 is a deficient number, since it is larger than the sum of its proper divisors (179043271153).

78216344155247 is a wasteful number, since it uses less digits than its factorization.

78216344155247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1986625.

The product of its digits is 45158400, while the sum is 59.

The spelling of 78216344155247 in words is "seventy-eight trillion, two hundred sixteen billion, three hundred forty-four million, one hundred fifty-five thousand, two hundred forty-seven".