85684120653 has 4 divisors (see below), whose sum is σ = 114245494208. Its totient is φ = 57122747100.

The previous prime is 85684120603. The next prime is 85684120663. The reversal of 85684120653 is 35602148658.

It is a happy number.

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 not a de Polignac number, because 85684120653 - 2¹⁶ = 85684055117 is a prime.

It is a super-2 number, since 2×85684120653² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85684120603) 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, 14280686773 + ... + 14280686778.

It is an arithmetic number, because the mean of its divisors is an integer number (28561373552).

Almost surely, 2^85684120653 is an apocalyptic number.

It is an amenable number.

85684120653 is a deficient number, since it is larger than the sum of its proper divisors (28561373555).

85684120653 is a wasteful number, since it uses less digits than its factorization.

85684120653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28561373554.

The product of its (nonzero) digits is 1382400, while the sum is 48.

The spelling of 85684120653 in words is "eighty-five billion, six hundred eighty-four million, one hundred twenty thousand, six hundred fifty-three".