216993287375 has 8 divisors (see below), whose sum is σ = 270807622800. Its totient is φ = 173594629800.

The previous prime is 216993287369. The next prime is 216993287383. The reversal of 216993287375 is 573782399612.

It is not a de Polignac number, because 216993287375 - 2⁶ = 216993287311 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 867973025 + ... + 867973274.

It is an arithmetic number, because the mean of its divisors is an integer number (33850952850).

Almost surely, 2^216993287375 is an apocalyptic number.

216993287375 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

216993287375 is a deficient number, since it is larger than the sum of its proper divisors (53814335425).

216993287375 is an equidigital number, since it uses as much as digits as its factorization.

216993287375 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1735946314 (or 1735946304 counting only the distinct ones).

The product of its digits is 34292160, while the sum is 62.

The spelling of 216993287375 in words is "two hundred sixteen billion, nine hundred ninety-three million, two hundred eighty-seven thousand, three hundred seventy-five".