645313313546 has 8 divisors (see below), whose sum is σ = 1055967240384. Its totient is φ = 293324233420.

The previous prime is 645313313537. The next prime is 645313313591.

It is a happy number.

645313313546 is nontrivially palindromic in base 10.

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

It is a junction number, because it is equal to n+sod(n) for n = 645313313497 and 645313313506.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14666211650 + ... + 14666211693.

It is an arithmetic number, because the mean of its divisors is an integer number (131995905048).

Almost surely, 2^645313313546 is an apocalyptic number.

645313313546 is a deficient number, since it is larger than the sum of its proper divisors (410653926838).

645313313546 is a wasteful number, since it uses less digits than its factorization.

645313313546 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29332423356.

The product of its digits is 1166400, while the sum is 44.

It can be divided in two parts, 645313 and 313546, that added together give a palindrome (958859).

The spelling of 645313313546 in words is "six hundred forty-five billion, three hundred thirteen million, three hundred thirteen thousand, five hundred forty-six".