211355699968 has 144 divisors (see below), whose sum is σ = 495046988800. Its totient is φ = 90019206144.

The previous prime is 211355699917. The next prime is 211355699977. The reversal of 211355699968 is 869996553112.

It is a Harshad number since it is a multiple of its sum of digits (64).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14305321 + ... + 14320087.

Almost surely, 2^211355699968 is an apocalyptic number.

211355699968 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 211355699968, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (247523494400).

211355699968 is an abundant number, since it is smaller than the sum of its proper divisors (283691288832).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

211355699968 is an equidigital number, since it uses as much as digits as its factorization.

211355699968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14967 (or 14939 counting only the distinct ones).

The product of its digits is 31492800, while the sum is 64.

The spelling of 211355699968 in words is "two hundred eleven billion, three hundred fifty-five million, six hundred ninety-nine thousand, nine hundred sixty-eight".