78216117241577 has 8 divisors (see below), whose sum is σ = 89389921310400. Its totient is φ = 67042331431344.

The previous prime is 78216117241573. The next prime is 78216117241627. The reversal of 78216117241577 is 77514271161287.

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 78216117241577 - 2² = 78216117241573 is a prime.

It is a super-2 number, since 2×78216117241577² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78216117241573) 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, 6357074 + ... + 14030132.

It is an arithmetic number, because the mean of its divisors is an integer number (11173740163800).

Almost surely, 2^{78216117241577} is an apocalyptic number.

It is an amenable number.

78216117241577 is a deficient number, since it is larger than the sum of its proper divisors (11173804068823).

78216117241577 is a wasteful number, since it uses less digits than its factorization.

78216117241577 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9129295.

The product of its digits is 9219840, while the sum is 59.

The spelling of 78216117241577 in words is "seventy-eight trillion, two hundred sixteen billion, one hundred seventeen million, two hundred forty-one thousand, five hundred seventy-seven".