78348641886 has 48 divisors (see below), whose sum is σ = 174574983024. Its totient is φ = 25383950592.

The previous prime is 78348641881. The next prime is 78348641909. The reversal of 78348641886 is 68814684387.

78348641886 is a `hidden beast` number, since 78 + 3 + 486 + 4 + 1 + 8 + 86 = 666.

It is a super-2 number, since 2×78348641886² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78348641881) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 281691 + ... + 485846.

It is an arithmetic number, because the mean of its divisors is an integer number (3636978813).

Almost surely, 2^78348641886 is an apocalyptic number.

78348641886 is an abundant number, since it is smaller than the sum of its proper divisors (96226341138).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

78348641886 is a wasteful number, since it uses less digits than its factorization.

78348641886 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 767705 (or 767702 counting only the distinct ones).

The product of its digits is 49545216, while the sum is 63.

The spelling of 78348641886 in words is "seventy-eight billion, three hundred forty-eight million, six hundred forty-one thousand, eight hundred eighty-six".