987258864399 has 16 divisors (see below), whose sum is σ = 1393874894592. Its totient is φ = 619413131648.

The previous prime is 987258864329. The next prime is 987258864443. The reversal of 987258864399 is 993468852789.

It is a cyclic number.

It is not a de Polignac number, because 987258864399 - 2⁹ = 987258863887 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (987258864329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 64492 + ... + 1406654.

It is an arithmetic number, because the mean of its divisors is an integer number (87117180912).

Almost surely, 2^987258864399 is an apocalyptic number.

987258864399 is a deficient number, since it is larger than the sum of its proper divisors (406616030193).

987258864399 is a wasteful number, since it uses less digits than its factorization.

987258864399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1356606.

The product of its digits is 1881169920, while the sum is 78.

The spelling of 987258864399 in words is "nine hundred eighty-seven billion, two hundred fifty-eight million, eight hundred sixty-four thousand, three hundred ninety-nine".