106646821108 has 12 divisors (see below), whose sum is σ = 188555978212. Its totient is φ = 52773684480.

The previous prime is 106646821091. The next prime is 106646821109. The reversal of 106646821108 is 801128646601.

It can be written as a sum of positive squares in 2 ways, for example, as 79365031524 + 27281789584 = 281718^2 + 165172^2 .

It is a super-2 number, since 2×106646821108² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (106646821109) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 137431083 + ... + 137431858.

Almost surely, 2^106646821108 is an apocalyptic number.

It is an amenable number.

106646821108 is a deficient number, since it is larger than the sum of its proper divisors (81909157104).

106646821108 is a wasteful number, since it uses less digits than its factorization.

106646821108 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 274863042 (or 274863040 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 43.

It can be divided in two parts, 106646821 and 108, that added together give a square (106646929 = 10327²).

The spelling of 106646821108 in words is "one hundred six billion, six hundred forty-six million, eight hundred twenty-one thousand, one hundred eight".