646116251063 has 8 divisors (see below), whose sum is σ = 687133942320. Its totient is φ = 605799717120.

The previous prime is 646116251059. The next prime is 646116251069. The reversal of 646116251063 is 360152611646.

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 646116251063 - 2² = 646116251059 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 646116251063.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (646116251069) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 175287428 + ... + 175291113.

It is an arithmetic number, because the mean of its divisors is an integer number (85891742790).

Almost surely, 2^646116251063 is an apocalyptic number.

646116251063 is a deficient number, since it is larger than the sum of its proper divisors (41017691257).

646116251063 is a wasteful number, since it uses less digits than its factorization.

646116251063 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 350578657.

The product of its (nonzero) digits is 155520, while the sum is 41.

The spelling of 646116251063 in words is "six hundred forty-six billion, one hundred sixteen million, two hundred fifty-one thousand, sixty-three".