78532823587 has 4 divisors (see below), whose sum is σ = 78535375776. Its totient is φ = 78530271400.

The previous prime is 78532823563. The next prime is 78532823591.

78532823587 is nontrivially palindromic in base 10.

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 78532823587 - 2⁷ = 78532823459 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78532823527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1229368 + ... + 1291669.

It is an arithmetic number, because the mean of its divisors is an integer number (19633843944).

Almost surely, 2^78532823587 is an apocalyptic number.

78532823587 is a deficient number, since it is larger than the sum of its proper divisors (2552189).

78532823587 is a wasteful number, since it uses less digits than its factorization.

78532823587 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2552188.

The product of its digits is 22579200, while the sum is 58.

The spelling of 78532823587 in words is "seventy-eight billion, five hundred thirty-two million, eight hundred twenty-three thousand, five hundred eighty-seven".