85565140973 has 4 divisors (see below), whose sum is σ = 92147074908. Its totient is φ = 78983207040.

The previous prime is 85565140963. The next prime is 85565141003. The reversal of 85565140973 is 37904156558.

It is a happy number.

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 47984216809 + 37580924164 = 219053^2 + 193858^2 .

It is a cyclic number.

It is not a de Polignac number, because 85565140973 - 2¹⁰ = 85565139949 is a prime.

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 (85565140933) 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, 3290966948 + ... + 3290966973.

It is an arithmetic number, because the mean of its divisors is an integer number (23036768727).

Almost surely, 2^85565140973 is an apocalyptic number.

It is an amenable number.

85565140973 is a deficient number, since it is larger than the sum of its proper divisors (6581933935).

85565140973 is a wasteful number, since it uses less digits than its factorization.

85565140973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6581933934.

The product of its (nonzero) digits is 4536000, while the sum is 53.

The spelling of 85565140973 in words is "eighty-five billion, five hundred sixty-five million, one hundred forty thousand, nine hundred seventy-three".