78454245487 has 2 divisors, whose sum is σ = 78454245488. Its totient is φ = 78454245486.

The previous prime is 78454245479. The next prime is 78454245511.

78454245487 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 78454245487 - 2³ = 78454245479 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78454242487) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39227122743 + 39227122744.

It is an arithmetic number, because the mean of its divisors is an integer number (39227122744).

Almost surely, 2^78454245487 is an apocalyptic number.

78454245487 is a deficient number, since it is larger than the sum of its proper divisors (1).

78454245487 is an equidigital number, since it uses as much as digits as its factorization.

78454245487 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 40140800, while the sum is 58.

The spelling of 78454245487 in words is "seventy-eight billion, four hundred fifty-four million, two hundred forty-five thousand, four hundred eighty-seven".