85215104847 has 24 divisors (see below), whose sum is σ = 123359968368. Its totient is φ = 56684908800.

The previous prime is 85215104797. The next prime is 85215104867. The reversal of 85215104847 is 74840151258.

85215104847 is a `hidden beast` number, since 8 + 52 + 1 + 510 + 4 + 84 + 7 = 666.

It is not a de Polignac number, because 85215104847 - 2⁶ = 85215104783 is a prime.

It is a super-2 number, since 2×85215104847² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85215104867) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8973772 + ... + 8983262.

It is an arithmetic number, because the mean of its divisors is an integer number (5139998682).

Almost surely, 2^85215104847 is an apocalyptic number.

85215104847 is a deficient number, since it is larger than the sum of its proper divisors (38144863521).

85215104847 is a wasteful number, since it uses less digits than its factorization.

85215104847 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11591 (or 11588 counting only the distinct ones).

The product of its (nonzero) digits is 358400, while the sum is 45.

The spelling of 85215104847 in words is "eighty-five billion, two hundred fifteen million, one hundred four thousand, eight hundred forty-seven".