8198542705 has 8 divisors (see below), whose sum is σ = 10023878952. Its totient is φ = 6435082368.

The previous prime is 8198542699. The next prime is 8198542739. The reversal of 8198542705 is 5072458918.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 3225331264 + 4973211441 = 56792^2 + 70521^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 8198542705 - 2⁷ = 8198542577 is a prime.

It is a super-2 number, since 2×8198542705² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 15468684 + ... + 15469213.

It is an arithmetic number, because the mean of its divisors is an integer number (1252984869).

Almost surely, 2^8198542705 is an apocalyptic number.

It is an amenable number.

8198542705 is a deficient number, since it is larger than the sum of its proper divisors (1825336247).

8198542705 is a wasteful number, since it uses less digits than its factorization.

8198542705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30937955.

The product of its (nonzero) digits is 806400, while the sum is 49.

The square root of 8198542705 is about 90545.8044582961. The cubic root of 8198542705 is about 2016.4102096605.

The spelling of 8198542705 in words is "eight billion, one hundred ninety-eight million, five hundred forty-two thousand, seven hundred five".