84685868644 has 12 divisors (see below), whose sum is σ = 159600291004. Its totient is φ = 39085785504.

The previous prime is 84685868621. The next prime is 84685868681. The reversal of 84685868644 is 44686858648.

It can be written as a sum of positive squares in 2 ways, for example, as 42799334400 + 41886534244 = 206880^2 + 204662^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 84685868644.

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, 814287147 + ... + 814287250.

Almost surely, 2^84685868644 is an apocalyptic number.

It is an amenable number.

84685868644 is a deficient number, since it is larger than the sum of its proper divisors (74914422360).

84685868644 is a wasteful number, since it uses less digits than its factorization.

84685868644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1628574414 (or 1628574412 counting only the distinct ones).

The product of its digits is 283115520, while the sum is 67.

The spelling of 84685868644 in words is "eighty-four billion, six hundred eighty-five million, eight hundred sixty-eight thousand, six hundred forty-four".