8106902581 has 4 divisors (see below), whose sum is σ = 8107084000. Its totient is φ = 8106721164.

The previous prime is 8106902563. The next prime is 8106902603. The reversal of 8106902581 is 1852096018.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8106902581 is a prime.

It is a super-2 number, since 2×8106902581² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8106902561) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28840 + ... + 130558.

It is an arithmetic number, because the mean of its divisors is an integer number (2026771000).

Almost surely, 2^8106902581 is an apocalyptic number.

It is an amenable number.

8106902581 is a deficient number, since it is larger than the sum of its proper divisors (181419).

8106902581 is a wasteful number, since it uses less digits than its factorization.

8106902581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181418.

The product of its (nonzero) digits is 34560, while the sum is 40.

The square root of 8106902581 is about 90038.3395060127. The cubic root of 8106902581 is about 2008.8691592847.

Adding to 8106902581 its reverse (1852096018), we get a palindrome (9958998599).

The spelling of 8106902581 in words is "eight billion, one hundred six million, nine hundred two thousand, five hundred eighty-one".