78552825587 has 4 divisors (see below), whose sum is σ = 78959835240. Its totient is φ = 78145815936.

The previous prime is 78552825581. The next prime is 78552825601.

78552825587 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 78552825587 - 2⁶ = 78552825523 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78552825581) 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, 203504537 + ... + 203504922.

It is an arithmetic number, because the mean of its divisors is an integer number (19739958810).

Almost surely, 2^78552825587 is an apocalyptic number.

78552825587 is a deficient number, since it is larger than the sum of its proper divisors (407009653).

78552825587 is a wasteful number, since it uses less digits than its factorization.

78552825587 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 407009652.

The product of its digits is 62720000, while the sum is 62.

The spelling of 78552825587 in words is "seventy-eight billion, five hundred fifty-two million, eight hundred twenty-five thousand, five hundred eighty-seven".