2117158862116 has 27 divisors (see below), whose sum is σ = 3837346059729. Its totient is φ = 1022035950768.

The previous prime is 2117158862111. The next prime is 2117158862123. The reversal of 2117158862116 is 6112688517112.

The square root of 2117158862116 is 1455046.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 1110186751716 + 1006972110400 = 1053654^2 + 1003480^2 .

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2117158862116.

It is not an unprimeable number, because it can be changed into a prime (2117158862111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 84380125 + ... + 84405211.

Almost surely, 2^{2117158862116} is an apocalyptic number.

2117158862116 is the 1455046-th square number.

It is an amenable number.

2117158862116 is a deficient number, since it is larger than the sum of its proper divisors (1720187197613).

2117158862116 is an frugal number, since it uses more digits than its factorization.

2117158862116 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50236 (or 25118 counting only the distinct ones).

The product of its digits is 322560, while the sum is 49.

Multiplying 2117158862116 by its sum of digits (49), we get a square (103740784243684 = 10185322²).

The spelling of 2117158862116 in words is "two trillion, one hundred seventeen billion, one hundred fifty-eight million, eight hundred sixty-two thousand, one hundred sixteen".