646443102141 has 12 divisors (see below), whose sum is σ = 958987665532. Its totient is φ = 419314444416.

The previous prime is 646443102101. The next prime is 646443102163. The reversal of 646443102141 is 141201344646.

646443102141 is a `hidden beast` number, since 6 + 4 + 6 + 4 + 431 + 0 + 214 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 434432583225 + 212010518916 = 659115^2 + 460446^2 .

It is not a de Polignac number, because 646443102141 - 2¹⁸ = 646442839997 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 646443102096 and 646443102105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (646443102101) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 970634956 + ... + 970635621.

Almost surely, 2^646443102141 is an apocalyptic number.

It is an amenable number.

646443102141 is a deficient number, since it is larger than the sum of its proper divisors (312544563391).

646443102141 is a wasteful number, since it uses less digits than its factorization.

646443102141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1941270620 (or 1941270617 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 36.

Adding to 646443102141 its reverse (141201344646), we get a palindrome (787644446787).

The spelling of 646443102141 in words is "six hundred forty-six billion, four hundred forty-three million, one hundred two thousand, one hundred forty-one".