646349427803 has 16 divisors (see below), whose sum is σ = 682762080000. Its totient is φ = 610177253472.

The previous prime is 646349427793. The next prime is 646349427817. The reversal of 646349427803 is 308724943646.

It is not a de Polignac number, because 646349427803 - 2⁸ = 646349427547 is a prime.

It is a super-3 number, since 3×646349427803³ (a number of 36 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (646349427883) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26522138 + ... + 26546496.

It is an arithmetic number, because the mean of its divisors is an integer number (42672630000).

Almost surely, 2^646349427803 is an apocalyptic number.

646349427803 is a deficient number, since it is larger than the sum of its proper divisors (36412652197).

646349427803 is a wasteful number, since it uses less digits than its factorization.

646349427803 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29234.

The product of its (nonzero) digits is 20901888, while the sum is 56.

The spelling of 646349427803 in words is "six hundred forty-six billion, three hundred forty-nine million, four hundred twenty-seven thousand, eight hundred three".