8102100681 has 16 divisors (see below), whose sum is σ = 12524987520. Its totient is φ = 5166556560.

The previous prime is 8102100653. The next prime is 8102100701. The reversal of 8102100681 is 1860012018.

It is not a de Polignac number, because 8102100681 - 2⁷ = 8102100553 is a prime.

It is a super-2 number, since 2×8102100681² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (8102100481) 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 15 ways as a sum of consecutive naturals, for example, 6522810 + ... + 6524051.

It is an arithmetic number, because the mean of its divisors is an integer number (782811720).

Almost surely, 2^8102100681 is an apocalyptic number.

It is an amenable number.

8102100681 is a deficient number, since it is larger than the sum of its proper divisors (4422886839).

8102100681 is a wasteful number, since it uses less digits than its factorization.

8102100681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13046893 (or 13046887 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 27.

The square root of 8102100681 is about 90011.6696934348. The cubic root of 8102100681 is about 2008.4724482129.

Adding to 8102100681 its reverse (1860012018), we get a palindrome (9962112699).

The spelling of 8102100681 in words is "eight billion, one hundred two million, one hundred thousand, six hundred eighty-one".