78506655768071 has 8 divisors (see below), whose sum is σ = 79242977767824. Its totient is φ = 77770382193280.

The previous prime is 78506655768007. The next prime is 78506655768323. The reversal of 78506655768071 is 17086755660587.

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 78506655768071 - 2⁶ = 78506655768007 is a prime.

It is a super-2 number, since 2×78506655768071² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 78506655767986 and 78506655768004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78506655768001) 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, 8844530 + ... + 15337503.

It is an arithmetic number, because the mean of its divisors is an integer number (9905372220978).

Almost surely, 2^{78506655768071} is an apocalyptic number.

78506655768071 is a deficient number, since it is larger than the sum of its proper divisors (736321999753).

78506655768071 is a wasteful number, since it uses less digits than its factorization.

78506655768071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24212481.

The product of its (nonzero) digits is 592704000, while the sum is 71.

The spelling of 78506655768071 in words is "seventy-eight trillion, five hundred six billion, six hundred fifty-five million, seven hundred sixty-eight thousand, seventy-one".