84650940865 has 4 divisors (see below), whose sum is σ = 101581129044. Its totient is φ = 67720752688.

The previous prime is 84650940859. The next prime is 84650940911. The reversal of 84650940865 is 56804905648.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 25365021696 + 59285919169 = 159264^2 + 243487^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-84650940865 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8465094082 + ... + 8465094091.

It is an arithmetic number, because the mean of its divisors is an integer number (25395282261).

Almost surely, 2^84650940865 is an apocalyptic number.

It is an amenable number.

84650940865 is a deficient number, since it is larger than the sum of its proper divisors (16930188179).

84650940865 is a wasteful number, since it uses less digits than its factorization.

84650940865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16930188178.

The product of its (nonzero) digits is 8294400, while the sum is 55.

The spelling of 84650940865 in words is "eighty-four billion, six hundred fifty million, nine hundred forty thousand, eight hundred sixty-five".