645316613546 has 8 divisors (see below), whose sum is σ = 1055972640384. Its totient is φ = 293325733420.

The previous prime is 645316613509. The next prime is 645316613593.

645316613546 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 = 645316613494 and 645316613503.

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, 14666286650 + ... + 14666286693.

It is an arithmetic number, because the mean of its divisors is an integer number (131996580048).

Almost surely, 2^645316613546 is an apocalyptic number.

645316613546 is a deficient number, since it is larger than the sum of its proper divisors (410656026838).

645316613546 is a wasteful number, since it uses less digits than its factorization.

645316613546 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29332573356.

The product of its digits is 4665600, while the sum is 50.

The spelling of 645316613546 in words is "six hundred forty-five billion, three hundred sixteen million, six hundred thirteen thousand, five hundred forty-six".