211977306488 has 16 divisors (see below), whose sum is σ = 397577904360. Its totient is φ = 105956532000.

The previous prime is 211977306481. The next prime is 211977306503. The reversal of 211977306488 is 884603779112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211977306481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3987098 + ... + 4039913.

Almost surely, 2^211977306488 is an apocalyptic number.

It is an amenable number.

211977306488 is a deficient number, since it is larger than the sum of its proper divisors (185600597872).

211977306488 is a wasteful number, since it uses less digits than its factorization.

211977306488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8030318 (or 8030314 counting only the distinct ones).

The product of its (nonzero) digits is 4064256, while the sum is 56.

The spelling of 211977306488 in words is "two hundred eleven billion, nine hundred seventy-seven million, three hundred six thousand, four hundred eighty-eight".