210797652906 has 64 divisors (see below), whose sum is σ = 474146265600. Its totient is φ = 69411310848.

The previous prime is 210797652893. The next prime is 210797652983. The reversal of 210797652906 is 609256797012.

210797652906 is a `hidden beast` number, since 2 + 107 + 9 + 7 + 6 + 529 + 0 + 6 = 666.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5252191 + ... + 5292173.

It is an arithmetic number, because the mean of its divisors is an integer number (7408535400).

Almost surely, 2^210797652906 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 210797652906, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (237073132800).

210797652906 is an abundant number, since it is smaller than the sum of its proper divisors (263348612694).

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

210797652906 is a wasteful number, since it uses less digits than its factorization.

210797652906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41180 (or 41174 counting only the distinct ones).

The product of its (nonzero) digits is 2857680, while the sum is 54.

The spelling of 210797652906 in words is "two hundred ten billion, seven hundred ninety-seven million, six hundred fifty-two thousand, nine hundred six".