78704044087 has 2 divisors, whose sum is σ = 78704044088. Its totient is φ = 78704044086.

The previous prime is 78704044079. The next prime is 78704044127. The reversal of 78704044087 is 78044040787.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 78704044087 - 2³ = 78704044079 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 78704044087.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78704044487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39352022043 + 39352022044.

It is an arithmetic number, because the mean of its divisors is an integer number (39352022044).

Almost surely, 2^78704044087 is an apocalyptic number.

78704044087 is a deficient number, since it is larger than the sum of its proper divisors (1).

78704044087 is an equidigital number, since it uses as much as digits as its factorization.

78704044087 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1404928, while the sum is 49.

The spelling of 78704044087 in words is "seventy-eight billion, seven hundred four million, forty-four thousand, eighty-seven".