216927651677 has 4 divisors (see below), whose sum is σ = 236648347296. Its totient is φ = 197206956060.

The previous prime is 216927651643. The next prime is 216927651701. The reversal of 216927651677 is 776156729612.

216927651677 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 216927651677 - 2⁶ = 216927651613 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216927651607) 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 3 ways as a sum of consecutive naturals, for example, 9860347793 + ... + 9860347814.

It is an arithmetic number, because the mean of its divisors is an integer number (59162086824).

Almost surely, 2^216927651677 is an apocalyptic number.

It is an amenable number.

216927651677 is a deficient number, since it is larger than the sum of its proper divisors (19720695619).

216927651677 is a wasteful number, since it uses less digits than its factorization.

216927651677 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19720695618.

The product of its digits is 13335840, while the sum is 59.

The spelling of 216927651677 in words is "two hundred sixteen billion, nine hundred twenty-seven million, six hundred fifty-one thousand, six hundred seventy-seven".