78558620741 has 2 divisors, whose sum is σ = 78558620742. Its totient is φ = 78558620740.

The previous prime is 78558620717. The next prime is 78558620747. The reversal of 78558620741 is 14702685587.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 77425288516 + 1133332225 = 278254^2 + 33665^2 .

It is a cyclic number.

It is not a de Polignac number, because 78558620741 - 2¹⁴ = 78558604357 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78558620747) 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, 39279310370 + 39279310371.

It is an arithmetic number, because the mean of its divisors is an integer number (39279310371).

Almost surely, 2^78558620741 is an apocalyptic number.

It is an amenable number.

78558620741 is a deficient number, since it is larger than the sum of its proper divisors (1).

78558620741 is an equidigital number, since it uses as much as digits as its factorization.

78558620741 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3763200, while the sum is 53.

The spelling of 78558620741 in words is "seventy-eight billion, five hundred fifty-eight million, six hundred twenty thousand, seven hundred forty-one".