85656215567 has 8 divisors (see below), whose sum is σ = 92250537120. Its totient is φ = 79062662880.

The previous prime is 85656215543. The next prime is 85656215569. The reversal of 85656215567 is 76551265658.

It is a happy number.

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 85656215567 - 2⁶ = 85656215503 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 (85656215569) 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, 50534 + ... + 416972.

It is an arithmetic number, because the mean of its divisors is an integer number (11531317140).

Almost surely, 2^85656215567 is an apocalyptic number.

85656215567 is a deficient number, since it is larger than the sum of its proper divisors (6594321553).

85656215567 is a wasteful number, since it uses less digits than its factorization.

85656215567 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 384433.

The product of its digits is 15120000, while the sum is 56.

The spelling of 85656215567 in words is "eighty-five billion, six hundred fifty-six million, two hundred fifteen thousand, five hundred sixty-seven".