85722144487 has 8 divisors (see below), whose sum is σ = 97994438816. Its totient is φ = 73456418592.

The previous prime is 85722144481. The next prime is 85722144491. The reversal of 85722144487 is 78444122758.

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 85722144487 - 2³¹ = 83574660839 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 (85722144481) 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, 1614108 + ... + 1666369.

It is an arithmetic number, because the mean of its divisors is an integer number (12249304852).

Almost surely, 2^85722144487 is an apocalyptic number.

85722144487 is a deficient number, since it is larger than the sum of its proper divisors (12272294329).

85722144487 is a wasteful number, since it uses less digits than its factorization.

85722144487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3284217.

The product of its digits is 4014080, while the sum is 52.

The spelling of 85722144487 in words is "eighty-five billion, seven hundred twenty-two million, one hundred forty-four thousand, four hundred eighty-seven".