85472198645 has 16 divisors (see below), whose sum is σ = 102919381488. Its totient is φ = 68143004160.

The previous prime is 85472198641. The next prime is 85472198653. The reversal of 85472198645 is 54689127458.

It can be written as a sum of positive squares in 8 ways, for example, as 10759083076 + 74713115569 = 103726^2 + 273337^2 .

It is not a de Polignac number, because 85472198645 - 2² = 85472198641 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85472198641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1693475 + ... + 1743215.

It is an arithmetic number, because the mean of its divisors is an integer number (6432461343).

Almost surely, 2^85472198645 is an apocalyptic number.

It is an amenable number.

85472198645 is a deficient number, since it is larger than the sum of its proper divisors (17447182843).

85472198645 is a wasteful number, since it uses less digits than its factorization.

85472198645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50920.

The product of its digits is 19353600, while the sum is 59.

The spelling of 85472198645 in words is "eighty-five billion, four hundred seventy-two million, one hundred ninety-eight thousand, six hundred forty-five".