210857965764 has 12 divisors (see below), whose sum is σ = 492001920144. Its totient is φ = 70285988584.

The previous prime is 210857965757. The next prime is 210857965783. The reversal of 210857965764 is 467569758012.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×210857965764² (a number of 23 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (60) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 210857965698 and 210857965707.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8785748562 + ... + 8785748585.

It is an arithmetic number, because the mean of its divisors is an integer number (41000160012).

Almost surely, 2^210857965764 is an apocalyptic number.

It is an amenable number.

210857965764 is an abundant number, since it is smaller than the sum of its proper divisors (281143954380).

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

210857965764 is a wasteful number, since it uses less digits than its factorization.

210857965764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17571497154 (or 17571497152 counting only the distinct ones).

The product of its (nonzero) digits is 25401600, while the sum is 60.

The spelling of 210857965764 in words is "two hundred ten billion, eight hundred fifty-seven million, nine hundred sixty-five thousand, seven hundred sixty-four".