645076670546 has 32 divisors (see below), whose sum is σ = 1226153842560. Its totient is φ = 247208428800.

The previous prime is 645076670531. The next prime is 645076670573.

645076670546 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×645076670546² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 645076670491 and 645076670500.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34325111 + ... + 34343898.

It is an arithmetic number, because the mean of its divisors is an integer number (38317307580).

Almost surely, 2^645076670546 is an apocalyptic number.

645076670546 is a deficient number, since it is larger than the sum of its proper divisors (581077172014).

645076670546 is a wasteful number, since it uses less digits than its factorization.

645076670546 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68669090.

The product of its (nonzero) digits is 25401600, while the sum is 56.

The spelling of 645076670546 in words is "six hundred forty-five billion, seventy-six million, six hundred seventy thousand, five hundred forty-six".