646554520226106 has 32 divisors (see below), whose sum is σ = 1436975173732800. Its totient is φ = 215490070757520.

The previous prime is 646554520226081. The next prime is 646554520226123. The reversal of 646554520226106 is 601622025455646.

646554520226106 is a `hidden beast` number, since 6 + 4 + 6 + 5 + 5 + 4 + 520 + 2 + 2 + 6 + 106 = 666.

It is a super-2 number, since 2×646554520226106² (a number of 30 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 780211240 + ... + 781039491.

It is an arithmetic number, because the mean of its divisors is an integer number (44905474179150).

Almost surely, 2^{646554520226106} is an apocalyptic number.

646554520226106 is an abundant number, since it is smaller than the sum of its proper divisors (790420653506694).

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

646554520226106 is a wasteful number, since it uses less digits than its factorization.

646554520226106 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1561258411 (or 1561258405 counting only the distinct ones).

The product of its (nonzero) digits is 20736000, while the sum is 54.

The spelling of 646554520226106 in words is "six hundred forty-six trillion, five hundred fifty-four billion, five hundred twenty million, two hundred twenty-six thousand, one hundred six".