77404043678 has 16 divisors (see below), whose sum is σ = 126903532560. Its totient is φ = 35191734336.

The previous prime is 77404043657. The next prime is 77404043683. The reversal of 77404043678 is 87634040477.

It is a congruent number.

It is an unprimeable number.

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, 22215263 + ... + 22218746.

It is an arithmetic number, because the mean of its divisors is an integer number (7931470785).

Almost surely, 2^77404043678 is an apocalyptic number.

77404043678 is a deficient number, since it is larger than the sum of its proper divisors (49499488882).

77404043678 is a wasteful number, since it uses less digits than its factorization.

77404043678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44434091.

The product of its (nonzero) digits is 3161088, while the sum is 50.

It can be divided in two parts, 774040 and 43678, that added together give a palindrome (817718).

The spelling of 77404043678 in words is "seventy-seven billion, four hundred four million, forty-three thousand, six hundred seventy-eight".