210643970045 has 6 divisors (see below), whose sum is σ = 252773995578. Its totient is φ = 168514355024.

The previous prime is 210643969973. The next prime is 210643970081. The reversal of 210643970045 is 540079346012.

It can be written as a sum of positive squares in 3 ways, for example, as 83210884 + 210560759161 = 9122^2 + 458869^2 .

It is a de Polignac number, because none of the positive numbers 2^k-210643970045 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 210643969984 and 210643970011.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 923639 + ... + 1128891.

It is an arithmetic number, because the mean of its divisors is an integer number (42128999263).

Almost surely, 2^210643970045 is an apocalyptic number.

It is an amenable number.

210643970045 is a deficient number, since it is larger than the sum of its proper divisors (42130025533).

210643970045 is an frugal number, since it uses more digits than its factorization.

210643970045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 410511 (or 205258 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 41.

The spelling of 210643970045 in words is "two hundred ten billion, six hundred forty-three million, nine hundred seventy thousand, forty-five".