646502261422361 has 4 divisors (see below), whose sum is σ = 647211923620224. Its totient is φ = 645792599224500.

The previous prime is 646502261422351. The next prime is 646502261422417. The reversal of 646502261422361 is 163224162205646.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 646502261422361 - 2¹⁴ = 646502261405977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (646502261422331) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 354831097565 + ... + 354831099386.

It is an arithmetic number, because the mean of its divisors is an integer number (161802980905056).

Almost surely, 2^{646502261422361} is an apocalyptic number.

It is an amenable number.

646502261422361 is a deficient number, since it is larger than the sum of its proper divisors (709662197863).

646502261422361 is an equidigital number, since it uses as much as digits as its factorization.

646502261422361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 709662197862.

The product of its (nonzero) digits is 4976640, while the sum is 50.

The spelling of 646502261422361 in words is "six hundred forty-six trillion, five hundred two billion, two hundred sixty-one million, four hundred twenty-two thousand, three hundred sixty-one".