78222463164647 has 4 divisors (see below), whose sum is σ = 78247053693816. Its totient is φ = 78197872635480.

The previous prime is 78222463164631. The next prime is 78222463164683. The reversal of 78222463164647 is 74646136422287.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 78222463164647 - 2⁴ = 78222463164631 is a prime.

It is a super-2 number, since 2×78222463164647² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 78222463164647.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78222463164617) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12295259813 + ... + 12295266174.

It is an arithmetic number, because the mean of its divisors is an integer number (19561763423454).

Almost surely, 2^{78222463164647} is an apocalyptic number.

78222463164647 is a deficient number, since it is larger than the sum of its proper divisors (24590529169).

78222463164647 is a wasteful number, since it uses less digits than its factorization.

78222463164647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24590529168.

The product of its digits is 130056192, while the sum is 62.

The spelling of 78222463164647 in words is "seventy-eight trillion, two hundred twenty-two billion, four hundred sixty-three million, one hundred sixty-four thousand, six hundred forty-seven".