213601640576 has 16 divisors (see below), whose sum is σ = 425534518590. Its totient is φ = 106800820224.

The previous prime is 213601640569. The next prime is 213601640591. The reversal of 213601640576 is 675046106312.

It can be written as a sum of positive squares in only one way, i.e., 114487489600 + 99114150976 = 338360^2 + 314824^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is a super-2 number, since 2×213601640576² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 834381281 + ... + 834381536.

Almost surely, 2^213601640576 is an apocalyptic number.

It is an amenable number.

213601640576 is a deficient number, since it is larger than the sum of its proper divisors (211932878014).

213601640576 is an equidigital number, since it uses as much as digits as its factorization.

213601640576 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1668762831 (or 1668762819 counting only the distinct ones).

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

Adding to 213601640576 its reverse (675046106312), we get a palindrome (888647746888).

The spelling of 213601640576 in words is "two hundred thirteen billion, six hundred one million, six hundred forty thousand, five hundred seventy-six".