2100646996456 has 16 divisors (see below), whose sum is σ = 3938850108000. Its totient is φ = 1050286967664.

The previous prime is 2100646996453. The next prime is 2100646996457. The reversal of 2100646996456 is 6546996460012.

It is a happy number.

It is a super-2 number, since 2×2100646996456² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2100646996456.

It is not an unprimeable number, because it can be changed into a prime (2100646996451) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 4321156 + ... + 4782643.

It is an arithmetic number, because the mean of its divisors is an integer number (246178131750).

Almost surely, 2^{2100646996456} is an apocalyptic number.

It is an amenable number.

2100646996456 is a deficient number, since it is larger than the sum of its proper divisors (1838203111544).

2100646996456 is a wasteful number, since it uses less digits than its factorization.

2100646996456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9132648 (or 9132644 counting only the distinct ones).

The product of its (nonzero) digits is 16796160, while the sum is 58.

The spelling of 2100646996456 in words is "two trillion, one hundred billion, six hundred forty-six million, nine hundred ninety-six thousand, four hundred fifty-six".