78739404826 has 16 divisors (see below), whose sum is σ = 118519809408. Its totient is φ = 39232868400.

The previous prime is 78739404761. The next prime is 78739404827. The reversal of 78739404826 is 62840493787.

It is not an unprimeable number, because it can be changed into a prime (78739404827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2736796 + ... + 2765416.

It is an arithmetic number, because the mean of its divisors is an integer number (7407488088).

Almost surely, 2^78739404826 is an apocalyptic number.

78739404826 is a deficient number, since it is larger than the sum of its proper divisors (39780404582).

78739404826 is a wasteful number, since it uses less digits than its factorization.

78739404826 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33357.

The product of its (nonzero) digits is 16257024, while the sum is 58.

The spelling of 78739404826 in words is "seventy-eight billion, seven hundred thirty-nine million, four hundred four thousand, eight hundred twenty-six".