211720756834 has 16 divisors (see below), whose sum is σ = 320582144736. Its totient is φ = 104860245600.

The previous prime is 211720756789. The next prime is 211720756853. The reversal of 211720756834 is 438657027112.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2285254 + ... + 2376094.

It is an arithmetic number, because the mean of its divisors is an integer number (20036384046).

Almost surely, 2^211720756834 is an apocalyptic number.

211720756834 is a deficient number, since it is larger than the sum of its proper divisors (108861387902).

211720756834 is a wasteful number, since it uses less digits than its factorization.

211720756834 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101841.

The product of its (nonzero) digits is 564480, while the sum is 46.

The spelling of 211720756834 in words is "two hundred eleven billion, seven hundred twenty million, seven hundred fifty-six thousand, eight hundred thirty-four".