78530826221413 has 2 divisors, whose sum is σ = 78530826221414. Its totient is φ = 78530826221412.

The previous prime is 78530826221383. The next prime is 78530826221527. The reversal of 78530826221413 is 31412262803587.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 69400862395524 + 9129963825889 = 8330718^2 + 3021583^2 .

It is a cyclic number.

It is not a de Polignac number, because 78530826221413 - 2¹⁷ = 78530826090341 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78530856221413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39265413110706 + 39265413110707.

It is an arithmetic number, because the mean of its divisors is an integer number (39265413110707).

Almost surely, 2^{78530826221413} is an apocalyptic number.

It is an amenable number.

78530826221413 is a deficient number, since it is larger than the sum of its proper divisors (1).

78530826221413 is an equidigital number, since it uses as much as digits as its factorization.

78530826221413 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3870720, while the sum is 52.

The spelling of 78530826221413 in words is "seventy-eight trillion, five hundred thirty billion, eight hundred twenty-six million, two hundred twenty-one thousand, four hundred thirteen".