85172430397833 has 20 divisors (see below), whose sum is σ = 127293506062800. Its totient is φ = 56754568403352.

The previous prime is 85172430397829. The next prime is 85172430397889. The reversal of 85172430397833 is 33879303427158.

85172430397833 is a `hidden beast` number, since 8 + 5 + 1 + 72 + 430 + 39 + 78 + 33 = 666.

It is not a de Polignac number, because 85172430397833 - 2² = 85172430397829 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (85172430397823) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 250309135 + ... + 250649172.

It is an arithmetic number, because the mean of its divisors is an integer number (6364675303140).

Almost surely, 2^{85172430397833} is an apocalyptic number.

It is an amenable number.

85172430397833 is a deficient number, since it is larger than the sum of its proper divisors (42121075664967).

85172430397833 is a wasteful number, since it uses less digits than its factorization.

85172430397833 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 500960418 (or 500960409 counting only the distinct ones).

The product of its (nonzero) digits is 91445760, while the sum is 63.

The spelling of 85172430397833 in words is "eighty-five trillion, one hundred seventy-two billion, four hundred thirty million, three hundred ninety-seven thousand, eight hundred thirty-three".