78528511 has 2 divisors, whose sum is σ = 78528512. Its totient is φ = 78528510.

The previous prime is 78528497. The next prime is 78528517. The reversal of 78528511 is 11582587.

It is a strong prime.

It is an emirp because it is prime and its reverse (11582587) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 78528511 - 2⁷ = 78528383 is a prime.

It is a plaindrome in base 13.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78528517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39264255 + 39264256.

It is an arithmetic number, because the mean of its divisors is an integer number (39264256).

Almost surely, 2^78528511 is an apocalyptic number.

78528511 is a deficient number, since it is larger than the sum of its proper divisors (1).

78528511 is an equidigital number, since it uses as much as digits as its factorization.

78528511 is an evil number, because the sum of its binary digits is even.

The product of its digits is 22400, while the sum is 37.

The square root of 78528511 is about 8861.6313960805. The cubic root of 78528511 is about 428.2287168824.

The spelling of 78528511 in words is "seventy-eight million, five hundred twenty-eight thousand, five hundred eleven".