78520000529 has 2 divisors, whose sum is σ = 78520000530. Its totient is φ = 78520000528.

The previous prime is 78520000519. The next prime is 78520000607. The reversal of 78520000529 is 92500002587.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 77551110400 + 968890129 = 278480^2 + 31127^2 .

It is a cyclic number.

It is not a de Polignac number, because 78520000529 - 2¹² = 78519996433 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 78520000492 and 78520000501.

It is not a weakly prime, because it can be changed into another prime (78520000519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39260000264 + 39260000265.

It is an arithmetic number, because the mean of its divisors is an integer number (39260000265).

Almost surely, 2^78520000529 is an apocalyptic number.

It is an amenable number.

78520000529 is a deficient number, since it is larger than the sum of its proper divisors (1).

78520000529 is an equidigital number, since it uses as much as digits as its factorization.

78520000529 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 50400, while the sum is 38.

The spelling of 78520000529 in words is "seventy-eight billion, five hundred twenty million, five hundred twenty-nine", and thus it is an aban number.