78349681926 has 24 divisors (see below), whose sum is σ = 171344168424. Its totient is φ = 25872480000.

The previous prime is 78349681919. The next prime is 78349681931. The reversal of 78349681926 is 62918694387.

It is a super-2 number, since 2×78349681926² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent 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 11 ways as a sum of consecutive naturals, for example, 20338075 + ... + 20341926.

It is an arithmetic number, because the mean of its divisors is an integer number (7139340351).

Almost surely, 2^78349681926 is an apocalyptic number.

78349681926 is an abundant number, since it is smaller than the sum of its proper divisors (92994486498).

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

78349681926 is a wasteful number, since it uses less digits than its factorization.

78349681926 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40680116 (or 40680113 counting only the distinct ones).

The product of its digits is 31352832, while the sum is 63.

The spelling of 78349681926 in words is "seventy-eight billion, three hundred forty-nine million, six hundred eighty-one thousand, nine hundred twenty-six".