210654997812 has 288 divisors, whose sum is σ = 670063363200. Its totient is φ = 56907131904.

The previous prime is 210654997783. The next prime is 210654997849. The reversal of 210654997812 is 218799456012.

It is a happy number.

210654997812 is a `hidden beast` number, since 2 + 1 + 0 + 6 + 549 + 97 + 8 + 1 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 59623198 + ... + 59626730.

It is an arithmetic number, because the mean of its divisors is an integer number (2326608900).

Almost surely, 2^210654997812 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 210654997812, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (335031681600).

210654997812 is an abundant number, since it is smaller than the sum of its proper divisors (459408365388).

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

210654997812 is a wasteful number, since it uses less digits than its factorization.

210654997812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4172 (or 4157 counting only the distinct ones).

The product of its (nonzero) digits is 2177280, while the sum is 54.

The spelling of 210654997812 in words is "two hundred ten billion, six hundred fifty-four million, nine hundred ninety-seven thousand, eight hundred twelve".