85721586452 has 12 divisors (see below), whose sum is σ = 150017083860. Its totient is φ = 42859562496.

The previous prime is 85721586451. The next prime is 85721586499. The reversal of 85721586452 is 25468512758.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 64834399876 + 20887186576 = 254626^2 + 144524^2 .

It is a junction number, because it is equal to n+sod(n) for n = 85721586394 and 85721586403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85721586451) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 140927 + ... + 437382.

It is an arithmetic number, because the mean of its divisors is an integer number (12501423655).

Almost surely, 2^85721586452 is an apocalyptic number.

It is an amenable number.

85721586452 is a deficient number, since it is larger than the sum of its proper divisors (64295497408).

85721586452 is a wasteful number, since it uses less digits than its factorization.

85721586452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 615370 (or 615368 counting only the distinct ones).

The product of its digits is 5376000, while the sum is 53.

The spelling of 85721586452 in words is "eighty-five billion, seven hundred twenty-one million, five hundred eighty-six thousand, four hundred fifty-two".