78164622077 has 8 divisors (see below), whose sum is σ = 81428215680. Its totient is φ = 74965654240.

The previous prime is 78164622013. The next prime is 78164622079. The reversal of 78164622077 is 77022646187.

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 78164622077 - 2⁶ = 78164622013 is a prime.

It is a super-2 number, since 2×78164622077² (a number of 23 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 (78164622079) 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, 16153973 + ... + 16158810.

It is an arithmetic number, because the mean of its divisors is an integer number (10178526960).

Almost surely, 2^78164622077 is an apocalyptic number.

It is an amenable number.

78164622077 is a deficient number, since it is larger than the sum of its proper divisors (3263593603).

78164622077 is a wasteful number, since it uses less digits than its factorization.

78164622077 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32312883.

The product of its (nonzero) digits is 1580544, while the sum is 50.

The spelling of 78164622077 in words is "seventy-eight billion, one hundred sixty-four million, six hundred twenty-two thousand, seventy-seven".