645436606634546 has 8 divisors (see below), whose sum is σ = 968244001261680. Its totient is φ = 322688606213988.

The previous prime is 645436606634531. The next prime is 645436606634557.

645436606634546 is nontrivially palindromic in base 10.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×645436606634546² (a number of 30 digits) contains 22 as substring.

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, 14848524476 + ... + 14848567943.

It is an arithmetic number, because the mean of its divisors is an integer number (121030500157710).

Almost surely, 2^{645436606634546} is an apocalyptic number.

645436606634546 is a deficient number, since it is larger than the sum of its proper divisors (322807394627134).

645436606634546 is a wasteful number, since it uses less digits than its factorization.

645436606634546 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29697103288.

The product of its (nonzero) digits is 2687385600, while the sum is 68.

The spelling of 645436606634546 in words is "six hundred forty-five trillion, four hundred thirty-six billion, six hundred six million, six hundred thirty-four thousand, five hundred forty-six".