78082559 has 4 divisors (see below), whose sum is σ = 78106704. Its totient is φ = 78058416.

The previous prime is 78082507. The next prime is 78082561. The reversal of 78082559 is 95528087.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 78082559 - 2¹² = 78078463 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78082579) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6302 + ... + 13995.

It is an arithmetic number, because the mean of its divisors is an integer number (19526676).

Almost surely, 2^78082559 is an apocalyptic number.

78082559 is a deficient number, since it is larger than the sum of its proper divisors (24145).

78082559 is a wasteful number, since it uses less digits than its factorization.

78082559 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24144.

The product of its (nonzero) digits is 201600, while the sum is 44.

The square root of 78082559 is about 8836.4336131722. The cubic root of 78082559 is about 427.4165613521.

The spelling of 78082559 in words is "seventy-eight million, eighty-two thousand, five hundred fifty-nine".