645373373546 has 8 divisors (see below), whose sum is σ = 1056065520384. Its totient is φ = 293351533420.

The previous prime is 645373373507. The next prime is 645373373563.

645373373546 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 2×645373373546² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 645373373491 and 645373373500.

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, 14667576650 + ... + 14667576693.

It is an arithmetic number, because the mean of its divisors is an integer number (132008190048).

Almost surely, 2^645373373546 is an apocalyptic number.

645373373546 is a deficient number, since it is larger than the sum of its proper divisors (410692146838).

645373373546 is a wasteful number, since it uses less digits than its factorization.

645373373546 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29335153356.

The product of its digits is 57153600, while the sum is 56.

The spelling of 645373373546 in words is "six hundred forty-five billion, three hundred seventy-three million, three hundred seventy-three thousand, five hundred forty-six".