211995954653 has 16 divisors (see below), whose sum is σ = 243184322304. Its totient is φ = 181034626560.

The previous prime is 211995954649. The next prime is 211995954661. The reversal of 211995954653 is 356459599112.

It is a cyclic number.

It is not a de Polignac number, because 211995954653 - 2² = 211995954649 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 211995954592 and 211995954601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211995954613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2037101 + ... + 2138637.

It is an arithmetic number, because the mean of its divisors is an integer number (15199020144).

Almost surely, 2^211995954653 is an apocalyptic number.

It is an amenable number.

211995954653 is a deficient number, since it is larger than the sum of its proper divisors (31188367651).

211995954653 is a wasteful number, since it uses less digits than its factorization.

211995954653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102652.

The product of its digits is 13122000, while the sum is 59.

The spelling of 211995954653 in words is "two hundred eleven billion, nine hundred ninety-five million, nine hundred fifty-four thousand, six hundred fifty-three".