78533428022381 has 2 divisors, whose sum is σ = 78533428022382. Its totient is φ = 78533428022380.

The previous prime is 78533428022353. The next prime is 78533428022429. The reversal of 78533428022381 is 18322082433587.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 68854895473225 + 9678532549156 = 8297885^2 + 3111034^2 .

It is a cyclic number.

It is not a de Polignac number, because 78533428022381 - 2¹⁴ = 78533428005997 is a prime.

It is a super-2 number, since 2×78533428022381² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78533428022281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39266714011190 + 39266714011191.

It is an arithmetic number, because the mean of its divisors is an integer number (39266714011191).

Almost surely, 2^{78533428022381} is an apocalyptic number.

It is an amenable number.

78533428022381 is a deficient number, since it is larger than the sum of its proper divisors (1).

78533428022381 is an equidigital number, since it uses as much as digits as its factorization.

78533428022381 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15482880, while the sum is 56.

The spelling of 78533428022381 in words is "seventy-eight trillion, five hundred thirty-three billion, four hundred twenty-eight million, twenty-two thousand, three hundred eighty-one".