78216342277571 has 8 divisors (see below), whose sum is σ = 80329587980400. Its totient is φ = 76129348074400.

The previous prime is 78216342277537. The next prime is 78216342277609. The reversal of 78216342277571 is 17577224361287.

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-78216342277571 is a prime.

It is a super-2 number, since 2×78216342277571² (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 (78216342276571) 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, 6562868876 + ... + 6562880793.

It is an arithmetic number, because the mean of its divisors is an integer number (10041198497550).

Almost surely, 2^{78216342277571} is an apocalyptic number.

78216342277571 is a deficient number, since it is larger than the sum of its proper divisors (2113245702829).

78216342277571 is a wasteful number, since it uses less digits than its factorization.

78216342277571 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13125749829.

The product of its digits is 55319040, while the sum is 62.

The spelling of 78216342277571 in words is "seventy-eight trillion, two hundred sixteen billion, three hundred forty-two million, two hundred seventy-seven thousand, five hundred seventy-one".