2106554643698 has 6 divisors (see below), whose sum is σ = 3159835044429. Its totient is φ = 1053276295556.

The previous prime is 2106554643691. The next prime is 2106554643701. The reversal of 2106554643698 is 8963464556012.

It can be written as a sum of positive squares in 2 ways, for example, as 2039049770209 + 67504873489 = 1427953^2 + 259817^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=1026293.

It is a super-2 number, since 2×2106554643698² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2106554643691) 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 2 ways as a sum of consecutive naturals, for example, 1539440 + ... + 2565732.

Almost surely, 2^{2106554643698} is an apocalyptic number.

2106554643698 is a deficient number, since it is larger than the sum of its proper divisors (1053280400731).

2106554643698 is an frugal number, since it uses more digits than its factorization.

2106554643698 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2052588 (or 1026295 counting only the distinct ones).

The product of its (nonzero) digits is 37324800, while the sum is 59.

The spelling of 2106554643698 in words is "two trillion, one hundred six billion, five hundred fifty-four million, six hundred forty-three thousand, six hundred ninety-eight".