85456615997 has 4 divisors (see below), whose sum is σ = 85558472160. Its totient is φ = 85354759836.

The previous prime is 85456615973. The next prime is 85456616017. The reversal of 85456615997 is 79951665458.

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 a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85456615997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85456615697) 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, 50926823 + ... + 50928500.

It is an arithmetic number, because the mean of its divisors is an integer number (21389618040).

Almost surely, 2^85456615997 is an apocalyptic number.

It is an amenable number.

85456615997 is a deficient number, since it is larger than the sum of its proper divisors (101856163).

85456615997 is a wasteful number, since it uses less digits than its factorization.

85456615997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101856162.

The product of its digits is 81648000, while the sum is 65.

The spelling of 85456615997 in words is "eighty-five billion, four hundred fifty-six million, six hundred fifteen thousand, nine hundred ninety-seven".