78467080877 has 4 divisors (see below), whose sum is σ = 78467644476. Its totient is φ = 78466517280.

The previous prime is 78467080843. The next prime is 78467080907. The reversal of 78467080877 is 77808076487.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 77808076487 = 3769 ⋅20644223.

It can be written as a sum of positive squares in 2 ways, for example, as 75004229161 + 3462851716 = 273869^2 + 58846^2 .

It is a cyclic number.

It is not a de Polignac number, because 78467080877 - 2¹⁸ = 78466818733 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78467010877) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 94823 + ... + 407339.

It is an arithmetic number, because the mean of its divisors is an integer number (19616911119).

Almost surely, 2^78467080877 is an apocalyptic number.

It is an amenable number.

78467080877 is a deficient number, since it is larger than the sum of its proper divisors (563599).

78467080877 is a wasteful number, since it uses less digits than its factorization.

78467080877 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 563598.

The product of its (nonzero) digits is 29503488, while the sum is 62.

The spelling of 78467080877 in words is "seventy-eight billion, four hundred sixty-seven million, eighty thousand, eight hundred seventy-seven".