646052503445 has 16 divisors (see below), whose sum is σ = 778851990000. Its totient is φ = 514454558208.

The previous prime is 646052503423. The next prime is 646052503451. The reversal of 646052503445 is 544305250646.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 2049463441 + 644003040004 = 45271^2 + 802498^2 .

It is a cyclic number.

It is not a de Polignac number, because 646052503445 - 2¹⁴ = 646052487061 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 646052503396 and 646052503405.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 667571 + ... + 1318239.

It is an arithmetic number, because the mean of its divisors is an integer number (48678249375).

Almost surely, 2^646052503445 is an apocalyptic number.

It is an amenable number.

646052503445 is a deficient number, since it is larger than the sum of its proper divisors (132799486555).

646052503445 is a wasteful number, since it uses less digits than its factorization.

646052503445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 651592.

The product of its (nonzero) digits is 1728000, while the sum is 44.

The spelling of 646052503445 in words is "six hundred forty-six billion, fifty-two million, five hundred three thousand, four hundred forty-five".