78441804864043 has 2 divisors, whose sum is σ = 78441804864044. Its totient is φ = 78441804864042.

The previous prime is 78441804863867. The next prime is 78441804864047. The reversal of 78441804864043 is 34046840814487.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 78441804864043 - 2¹³ = 78441804855851 is a prime.

It is not a weakly prime, because it can be changed into another prime (78441804864047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39220902432021 + 39220902432022.

It is an arithmetic number, because the mean of its divisors is an integer number (39220902432022).

Almost surely, 2^{78441804864043} is an apocalyptic number.

78441804864043 is a deficient number, since it is larger than the sum of its proper divisors (1).

78441804864043 is an equidigital number, since it uses as much as digits as its factorization.

78441804864043 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 66060288, while the sum is 61.

The spelling of 78441804864043 in words is "seventy-eight trillion, four hundred forty-one billion, eight hundred four million, eight hundred sixty-four thousand, forty-three".