4102100563681 has 2 divisors, whose sum is σ = 4102100563682. Its totient is φ = 4102100563680.

The previous prime is 4102100563657. The next prime is 4102100563727. The reversal of 4102100563681 is 1863650012014.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3960637318225 + 141463245456 = 1990135^2 + 376116^2 .

It is a cyclic number.

It is not a de Polignac number, because 4102100563681 - 2¹³ = 4102100555489 is a prime.

It is a super-2 number, since 2×4102100563681² (a number of 26 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 4102100563681.

It is not a weakly prime, because it can be changed into another prime (4102100663681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2051050281840 + 2051050281841.

It is an arithmetic number, because the mean of its divisors is an integer number (2051050281841).

Almost surely, 2^{4102100563681} is an apocalyptic number.

It is an amenable number.

4102100563681 is a deficient number, since it is larger than the sum of its proper divisors (1).

4102100563681 is an equidigital number, since it uses as much as digits as its factorization.

4102100563681 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34560, while the sum is 37.

Adding to 4102100563681 its reverse (1863650012014), we get a palindrome (5965750575695).

The spelling of 4102100563681 in words is "four trillion, one hundred two billion, one hundred million, five hundred sixty-three thousand, six hundred eighty-one".