78622778882 has 54 divisors (see below), whose sum is σ = 127632168027. Its totient is φ = 36316902528.

The previous prime is 78622778851. The next prime is 78622778891. The reversal of 78622778882 is 28887722687.

It can be written as a sum of positive squares in 5 ways, for example, as 72302369881 + 6320409001 = 268891^2 + 79501^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=198271.

It is a Duffinian number.

It is an unprimeable number.

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 26 ways as a sum of consecutive naturals, for example, 721309844 + ... + 721309952.

Almost surely, 2^78622778882 is an apocalyptic number.

78622778882 is a deficient number, since it is larger than the sum of its proper divisors (49009389145).

78622778882 is a wasteful number, since it uses less digits than its factorization.

78622778882 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 468 (or 235 counting only the distinct ones).

The product of its digits is 67436544, while the sum is 65.

The spelling of 78622778882 in words is "seventy-eight billion, six hundred twenty-two million, seven hundred seventy-eight thousand, eight hundred eighty-two".