211706651601552 has 80 divisors (see below), whose sum is σ = 552625225971840. Its totient is φ = 69831492734976.

The previous prime is 211706651601509. The next prime is 211706651601587. The reversal of 211706651601552 is 255106156607112.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29748238 + ... + 36171410.

It is an arithmetic number, because the mean of its divisors is an integer number (6907815324648).

Almost surely, 2^{211706651601552} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 211706651601552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (276312612985920).

211706651601552 is an abundant number, since it is smaller than the sum of its proper divisors (340918574370288).

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

211706651601552 is a wasteful number, since it uses less digits than its factorization.

211706651601552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6430360 (or 6430354 counting only the distinct ones).

The product of its (nonzero) digits is 756000, while the sum is 48.

The spelling of 211706651601552 in words is "two hundred eleven trillion, seven hundred six billion, six hundred fifty-one million, six hundred one thousand, five hundred fifty-two".