987578626875789 has 16 divisors (see below), whose sum is σ = 1420156243844352. Its totient is φ = 606842996705088.

The previous prime is 987578626875773. The next prime is 987578626875823.

987578626875789 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 987578626875789 - 2⁴ = 987578626875773 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 987578626875693 and 987578626875702.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (987578626875739) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18701989029 + ... + 18702041834.

It is an arithmetic number, because the mean of its divisors is an integer number (88759765240272).

Almost surely, 2^{987578626875789} is an apocalyptic number.

It is an amenable number.

987578626875789 is a deficient number, since it is larger than the sum of its proper divisors (432577616968563).

987578626875789 is a wasteful number, since it uses less digits than its factorization.

987578626875789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37404031556.

The product of its digits is 1433869516800, while the sum is 102.

The spelling of 987578626875789 in words is "nine hundred eighty-seven trillion, five hundred seventy-eight billion, six hundred twenty-six million, eight hundred seventy-five thousand, seven hundred eighty-nine".