85444444997 has 4 divisors (see below), whose sum is σ = 85451853696. Its totient is φ = 85437036300.

The previous prime is 85444444949. The next prime is 85444445081. The reversal of 85444444997 is 79944444458.

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 not a de Polignac number, because 85444444997 - 2²⁰ = 85443396421 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 (85444440997) 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, 3687023 + ... + 3710124.

It is an arithmetic number, because the mean of its divisors is an integer number (21362963424).

Almost surely, 2^85444444997 is an apocalyptic number.

It is an amenable number.

85444444997 is a deficient number, since it is larger than the sum of its proper divisors (7408699).

85444444997 is a wasteful number, since it uses less digits than its factorization.

85444444997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7408698.

The product of its digits is 92897280, while the sum is 62.

The spelling of 85444444997 in words is "eighty-five billion, four hundred forty-four million, four hundred forty-four thousand, nine hundred ninety-seven".