78541814587 has 2 divisors, whose sum is σ = 78541814588. Its totient is φ = 78541814586.

The previous prime is 78541814579. The next prime is 78541814627.

78541814587 is nontrivially palindromic in base 10.

It is a weak prime.

It is a palprime.

It is a cyclic number.

It is not a de Polignac number, because 78541814587 - 2³ = 78541814579 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is not a weakly prime, because it can be changed into another prime (78541814887) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39270907293 + 39270907294.

It is an arithmetic number, because the mean of its divisors is an integer number (39270907294).

Almost surely, 2^78541814587 is an apocalyptic number.

78541814587 is a deficient number, since it is larger than the sum of its proper divisors (1).

78541814587 is an equidigital number, since it uses as much as digits as its factorization.

78541814587 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10035200, while the sum is 58.

The spelling of 78541814587 in words is "seventy-eight billion, five hundred forty-one million, eight hundred fourteen thousand, five hundred eighty-seven".