646103404011243 has 16 divisors (see below), whose sum is σ = 881523516473600. Its totient is φ = 420709858408224.

The previous prime is 646103404011229. The next prime is 646103404011287. The reversal of 646103404011243 is 342110404301646.

It is not a de Polignac number, because 646103404011243 - 2⁹ = 646103404010731 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (646103404011743) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45101143 + ... + 57674256.

It is an arithmetic number, because the mean of its divisors is an integer number (55095219779600).

Almost surely, 2^{646103404011243} is an apocalyptic number.

646103404011243 is a deficient number, since it is larger than the sum of its proper divisors (235420112462357).

646103404011243 is a wasteful number, since it uses less digits than its factorization.

646103404011243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102824178.

The product of its (nonzero) digits is 165888, while the sum is 39.

Adding to 646103404011243 its reverse (342110404301646), we get a palindrome (988213808312889).

The spelling of 646103404011243 in words is "six hundred forty-six trillion, one hundred three billion, four hundred four million, eleven thousand, two hundred forty-three".