6420649578203 has 32 divisors (see below), whose sum is σ = 7516904655360. Its totient is φ = 5370810105600.

The previous prime is 6420649578191. The next prime is 6420649578209. The reversal of 6420649578203 is 3028759460246.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6420649578203 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6420649578209) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 81454376 + ... + 81533162.

It is an arithmetic number, because the mean of its divisors is an integer number (234903270480).

Almost surely, 2^{6420649578203} is an apocalyptic number.

6420649578203 is a deficient number, since it is larger than the sum of its proper divisors (1096255077157).

6420649578203 is a wasteful number, since it uses less digits than its factorization.

6420649578203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80547.

The product of its (nonzero) digits is 17418240, while the sum is 56.

The spelling of 6420649578203 in words is "six trillion, four hundred twenty billion, six hundred forty-nine million, five hundred seventy-eight thousand, two hundred three".