78530826221385 has 16 divisors (see below), whose sum is σ = 126893374649280. Its totient is φ = 41468423086400.

The previous prime is 78530826221383. The next prime is 78530826221413. The reversal of 78530826221385 is 58312262803587.

It is not a de Polignac number, because 78530826221385 - 2¹ = 78530826221383 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (78530826221383) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25917762915 + ... + 25917765944.

It is an arithmetic number, because the mean of its divisors is an integer number (7930835915580).

Almost surely, 2^{78530826221385} is an apocalyptic number.

It is an amenable number.

78530826221385 is a deficient number, since it is larger than the sum of its proper divisors (48362548427895).

78530826221385 is a wasteful number, since it uses less digits than its factorization.

78530826221385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51835528968.

The product of its (nonzero) digits is 38707200, while the sum is 60.

The spelling of 78530826221385 in words is "seventy-eight trillion, five hundred thirty billion, eight hundred twenty-six million, two hundred twenty-one thousand, three hundred eighty-five".