85531616409 has 8 divisors (see below), whose sum is σ = 114741800992. Its totient is φ = 56671254720.

The previous prime is 85531616389. The next prime is 85531616483. The reversal of 85531616409 is 90461613558.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 85531616409 - 2³² = 81236649113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85531656409) 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, 87455152 + ... + 87456129.

It is an arithmetic number, because the mean of its divisors is an integer number (14342725124).

Almost surely, 2^85531616409 is an apocalyptic number.

It is an amenable number.

85531616409 is a deficient number, since it is larger than the sum of its proper divisors (29210184583).

85531616409 is a wasteful number, since it uses less digits than its factorization.

85531616409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174911447.

The product of its (nonzero) digits is 777600, while the sum is 48.

The spelling of 85531616409 in words is "eighty-five billion, five hundred thirty-one million, six hundred sixteen thousand, four hundred nine".