85370244665 has 4 divisors (see below), whose sum is σ = 102444293604. Its totient is φ = 68296195728.

The previous prime is 85370244643. The next prime is 85370244679. The reversal of 85370244665 is 56644207358.

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 55735655056 + 29634589609 = 236084^2 + 172147^2 .

It is a cyclic number.

It is not a de Polignac number, because 85370244665 - 2⁸ = 85370244409 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8537024462 + ... + 8537024471.

It is an arithmetic number, because the mean of its divisors is an integer number (25611073401).

Almost surely, 2^85370244665 is an apocalyptic number.

It is an amenable number.

85370244665 is a deficient number, since it is larger than the sum of its proper divisors (17074048939).

85370244665 is a wasteful number, since it uses less digits than its factorization.

85370244665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17074048938.

The product of its (nonzero) digits is 4838400, while the sum is 50.

The spelling of 85370244665 in words is "eighty-five billion, three hundred seventy million, two hundred forty-four thousand, six hundred sixty-five".