211634052534 has 64 divisors (see below), whose sum is σ = 477527182080. Its totient is φ = 69461219520.

The previous prime is 211634052449. The next prime is 211634052557. The reversal of 211634052534 is 435250436112.

211634052534 is a `hidden beast` number, since 2 + 1 + 1 + 63 + 40 + 525 + 34 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9109377 + ... + 9132579.

It is an arithmetic number, because the mean of its divisors is an integer number (7461362220).

Almost surely, 2^211634052534 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 211634052534, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (238763591040).

211634052534 is an abundant number, since it is smaller than the sum of its proper divisors (265893129546).

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

211634052534 is a wasteful number, since it uses less digits than its factorization.

211634052534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25802 (or 25796 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 36.

Adding to 211634052534 its reverse (435250436112), we get a palindrome (646884488646).

The spelling of 211634052534 in words is "two hundred eleven billion, six hundred thirty-four million, fifty-two thousand, five hundred thirty-four".