216005239761 has 16 divisors (see below), whose sum is σ = 295806652800. Its totient is φ = 140104073088.

The previous prime is 216005239753. The next prime is 216005239777. The reversal of 216005239761 is 167932500612.

216005239761 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 216005239761 - 2³ = 216005239753 is a prime.

It is not an unprimeable number, because it can be changed into a prime (216005239361) 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 15 ways as a sum of consecutive naturals, for example, 2714580 + ... + 2793018.

It is an arithmetic number, because the mean of its divisors is an integer number (18487915800).

Almost surely, 2^216005239761 is an apocalyptic number.

It is an amenable number.

216005239761 is a deficient number, since it is larger than the sum of its proper divisors (79801413039).

216005239761 is a wasteful number, since it uses less digits than its factorization.

216005239761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103288.

The product of its (nonzero) digits is 136080, while the sum is 42.

The spelling of 216005239761 in words is "two hundred sixteen billion, five million, two hundred thirty-nine thousand, seven hundred sixty-one".