85297536180621 has 6 divisors (see below), whose sum is σ = 123207552260910. Its totient is φ = 56865024120408.

The previous prime is 85297536180553. The next prime is 85297536180683. The reversal of 85297536180621 is 12608163579258.

85297536180621 is a `hidden beast` number, since 8 + 5 + 2 + 9 + 7 + 5 + 3 + 618 + 0 + 6 + 2 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 56638794515625 + 28658741664996 = 7525875^2 + 5353386^2 .

It is not a de Polignac number, because 85297536180621 - 2²³ = 85297527792013 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85297536380621) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4738752010026 + ... + 4738752010043.

It is an arithmetic number, because the mean of its divisors is an integer number (20534592043485).

Almost surely, 2^{85297536180621} is an apocalyptic number.

It is an amenable number.

85297536180621 is a deficient number, since it is larger than the sum of its proper divisors (37910016080289).

85297536180621 is a wasteful number, since it uses less digits than its factorization.

85297536180621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9477504020075 (or 9477504020072 counting only the distinct ones).

The product of its (nonzero) digits is 43545600, while the sum is 63.

The spelling of 85297536180621 in words is "eighty-five trillion, two hundred ninety-seven billion, five hundred thirty-six million, one hundred eighty thousand, six hundred twenty-one".