85440678653 has 8 divisors (see below), whose sum is σ = 93252656640. Its totient is φ = 77636141280.

The previous prime is 85440678619. The next prime is 85440678727. The reversal of 85440678653 is 35687604458.

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 85440678653 - 2¹⁶ = 85440613117 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85440675653) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1836125 + ... + 1882082.

It is an arithmetic number, because the mean of its divisors is an integer number (11656582080).

Almost surely, 2^85440678653 is an apocalyptic number.

It is an amenable number.

85440678653 is a deficient number, since it is larger than the sum of its proper divisors (7811977987).

85440678653 is a wasteful number, since it uses less digits than its factorization.

85440678653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3720307.

The product of its (nonzero) digits is 19353600, while the sum is 56.

The spelling of 85440678653 in words is "eighty-five billion, four hundred forty million, six hundred seventy-eight thousand, six hundred fifty-three".