646520512224155 has 8 divisors (see below), whose sum is σ = 777090233946192. Its totient is φ = 516372663594528.

The previous prime is 646520512224151. The next prime is 646520512224163. The reversal of 646520512224155 is 551422215025646.

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

It is a cyclic number.

It is not a de Polignac number, because 646520512224155 - 2² = 646520512224151 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (646520512224151) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 105468269729 + ... + 105468275858.

It is an arithmetic number, because the mean of its divisors is an integer number (97136279243274).

Almost surely, 2^{646520512224155} is an apocalyptic number.

646520512224155 is a deficient number, since it is larger than the sum of its proper divisors (130569721722037).

646520512224155 is a wasteful number, since it uses less digits than its factorization.

646520512224155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210936546205.

The product of its (nonzero) digits is 5760000, while the sum is 50.

The spelling of 646520512224155 in words is "six hundred forty-six trillion, five hundred twenty billion, five hundred twelve million, two hundred twenty-four thousand, one hundred fifty-five".