645265562546 has 16 divisors (see below), whose sum is σ = 1066343453568. Its totient is φ = 290398542000.

The previous prime is 645265562537. The next prime is 645265562561.

645265562546 is nontrivially palindromic in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 645265562491 and 645265562500.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 145197050 + ... + 145201493.

It is an arithmetic number, because the mean of its divisors is an integer number (66646465848).

Almost surely, 2^645265562546 is an apocalyptic number.

645265562546 is a deficient number, since it is larger than the sum of its proper divisors (421077891022).

645265562546 is a wasteful number, since it uses less digits than its factorization.

645265562546 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 290398657.

The product of its digits is 51840000, while the sum is 56.

The spelling of 645265562546 in words is "six hundred forty-five billion, two hundred sixty-five million, five hundred sixty-two thousand, five hundred forty-six".