78045858308447 has 2 divisors, whose sum is σ = 78045858308448. Its totient is φ = 78045858308446.

The previous prime is 78045858308401. The next prime is 78045858308503. The reversal of 78045858308447 is 74480385854087.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 78045858308447 - 2²⁶ = 78045791199583 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78045858307447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39022929154223 + 39022929154224.

It is an arithmetic number, because the mean of its divisors is an integer number (39022929154224).

Almost surely, 2^{78045858308447} is an apocalyptic number.

78045858308447 is a deficient number, since it is larger than the sum of its proper divisors (1).

78045858308447 is an equidigital number, since it uses as much as digits as its factorization.

78045858308447 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 963379200, while the sum is 71.

The spelling of 78045858308447 in words is "seventy-eight trillion, forty-five billion, eight hundred fifty-eight million, three hundred eight thousand, four hundred forty-seven".