646243320362 has 16 divisors (see below), whose sum is σ = 976667974920. Its totient is φ = 320695350528.

The previous prime is 646243320353. The next prime is 646243320377. The reversal of 646243320362 is 263023342646.

It can be written as a sum of positive squares in 4 ways, for example, as 628898166961 + 17345153401 = 793031^2 + 131701^2 .

It is a super-2 number, since 2×646243320362² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1844003 + ... + 2166294.

Almost surely, 2^646243320362 is an apocalyptic number.

646243320362 is a deficient number, since it is larger than the sum of its proper divisors (330424654558).

646243320362 is a wasteful number, since it uses less digits than its factorization.

646243320362 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4010905.

The product of its (nonzero) digits is 746496, while the sum is 41.

The spelling of 646243320362 in words is "six hundred forty-six billion, two hundred forty-three million, three hundred twenty thousand, three hundred sixty-two".