646226660280 has 32 divisors (see below), whose sum is σ = 1938679981200. Its totient is φ = 172327109376.

The previous prime is 646226660267. The next prime is 646226660327. The reversal of 646226660280 is 82066622646.

646226660280 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2692610965 + ... + 2692611204.

Almost surely, 2^646226660280 is an apocalyptic number.

646226660280 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

646226660280 is an abundant number, since it is smaller than the sum of its proper divisors (1292453320920).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

646226660280 is a wasteful number, since it uses less digits than its factorization.

646226660280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5385222183 (or 5385222179 counting only the distinct ones).

The product of its (nonzero) digits is 1990656, while the sum is 48.

The spelling of 646226660280 in words is "six hundred forty-six billion, two hundred twenty-six million, six hundred sixty thousand, two hundred eighty".