645859958546 has 8 divisors (see below), whose sum is σ = 1056861750384. Its totient is φ = 293572708420.

The previous prime is 645859958533. The next prime is 645859958567.

645859958546 is nontrivially palindromic in base 10.

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

It is a Curzon number.

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, 14678635400 + ... + 14678635443.

It is an arithmetic number, because the mean of its divisors is an integer number (132107718798).

Almost surely, 2^645859958546 is an apocalyptic number.

645859958546 is a deficient number, since it is larger than the sum of its proper divisors (411001791838).

645859958546 is a wasteful number, since it uses less digits than its factorization.

645859958546 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29357270856.

The product of its digits is 1866240000, while the sum is 74.

The spelling of 645859958546 in words is "six hundred forty-five billion, eight hundred fifty-nine million, nine hundred fifty-eight thousand, five hundred forty-six".