78529034461 has 2 divisors, whose sum is σ = 78529034462. Its totient is φ = 78529034460.

The previous prime is 78529034459. The next prime is 78529034561. The reversal of 78529034461 is 16443092587.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 65385558436 + 13143476025 = 255706^2 + 114645^2 .

It is a cyclic number.

It is not a de Polignac number, because 78529034461 - 2¹ = 78529034459 is a prime.

Together with 78529034459, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78529034411) 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 as a sum of consecutive naturals, namely, 39264517230 + 39264517231.

It is an arithmetic number, because the mean of its divisors is an integer number (39264517231).

It is a 1-persistent number, because it is pandigital, but 2⋅78529034461 = 157058068922 is not.

Almost surely, 2^78529034461 is an apocalyptic number.

It is an amenable number.

78529034461 is a deficient number, since it is larger than the sum of its proper divisors (1).

78529034461 is an equidigital number, since it uses as much as digits as its factorization.

78529034461 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1451520, while the sum is 49.

The spelling of 78529034461 in words is "seventy-eight billion, five hundred twenty-nine million, thirty-four thousand, four hundred sixty-one".