211753957838 has 32 divisors (see below), whose sum is σ = 324733194912. Its totient is φ = 103530700800.

The previous prime is 211753957813. The next prime is 211753957843. The reversal of 211753957838 is 838759357112.

It is a congruent number.

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, 55825670 + ... + 55829462.

It is an arithmetic number, because the mean of its divisors is an integer number (10147912341).

Almost surely, 2^211753957838 is an apocalyptic number.

211753957838 is a deficient number, since it is larger than the sum of its proper divisors (112979237074).

211753957838 is a wasteful number, since it uses less digits than its factorization.

211753957838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6420.

The product of its digits is 12700800, while the sum is 59.

The spelling of 211753957838 in words is "two hundred eleven billion, seven hundred fifty-three million, nine hundred fifty-seven thousand, eight hundred thirty-eight".