2113634403681 has 8 divisors (see below), whose sum is σ = 2818837213920. Its totient is φ = 1408760597952.

The previous prime is 2113634403679. The next prime is 2113634403697. The reversal of 2113634403681 is 1863044363112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2113634403681 - 2¹ = 2113634403679 is a prime.

It is a super-2 number, since 2×2113634403681² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2113634403611) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 82236136 + ... + 82261833.

It is an arithmetic number, because the mean of its divisors is an integer number (352354651740).

Almost surely, 2^{2113634403681} is an apocalyptic number.

It is an amenable number.

2113634403681 is a deficient number, since it is larger than the sum of its proper divisors (705202810239).

2113634403681 is a wasteful number, since it uses less digits than its factorization.

2113634403681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164502255.

The product of its (nonzero) digits is 248832, while the sum is 42.

Adding to 2113634403681 its reverse (1863044363112), we get a palindrome (3976678766793).

The spelling of 2113634403681 in words is "two trillion, one hundred thirteen billion, six hundred thirty-four million, four hundred three thousand, six hundred eighty-one".