8105642473 has 4 divisors (see below), whose sum is σ = 8109535888. Its totient is φ = 8101749060.

The previous prime is 8105642453. The next prime is 8105642533. The reversal of 8105642473 is 3742465018.

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 not a de Polignac number, because 8105642473 - 2²¹ = 8103545321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8105642443) 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, 1943583 + ... + 1947748.

It is an arithmetic number, because the mean of its divisors is an integer number (2027383972).

Almost surely, 2^8105642473 is an apocalyptic number.

It is an amenable number.

8105642473 is a deficient number, since it is larger than the sum of its proper divisors (3893415).

8105642473 is a wasteful number, since it uses less digits than its factorization.

8105642473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3893414.

The product of its (nonzero) digits is 161280, while the sum is 40.

The square root of 8105642473 is about 90031.3416150176. The cubic root of 8105642473 is about 2008.7650700742.

The spelling of 8105642473 in words is "eight billion, one hundred five million, six hundred forty-two thousand, four hundred seventy-three".