999989083740815 has 64 divisors (see below), whose sum is σ = 1442892932490240. Its totient is φ = 650874143554560.

The previous prime is 999989083740761. The next prime is 999989083740877. The reversal of 999989083740815 is 518047380989999.

It is a Cunningham number, because it is equal to 31622604²-1.

It is not a de Polignac number, because 999989083740815 - 2³⁴ = 999971903871631 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1296141164 + ... + 1296912446.

It is an arithmetic number, because the mean of its divisors is an integer number (22545202070160).

Almost surely, 2^{999989083740815} is an apocalyptic number.

999989083740815 is a deficient number, since it is larger than the sum of its proper divisors (442903848749425).

999989083740815 is a wasteful number, since it uses less digits than its factorization.

999989083740815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 795792.

The product of its (nonzero) digits is 12697896960, while the sum is 89.

The spelling of 999989083740815 in words is "nine hundred ninety-nine trillion, nine hundred eighty-nine billion, eighty-three million, seven hundred forty thousand, eight hundred fifteen".