85252725249 has 4 divisors (see below), whose sum is σ = 113670300336. Its totient is φ = 56835150164.

The previous prime is 85252725193. The next prime is 85252725251. The reversal of 85252725249 is 94252725258.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 85252725249 - 2¹² = 85252721153 is a prime.

It is a super-2 number, since 2×85252725249² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (85252725149) 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, 14208787539 + ... + 14208787544.

It is an arithmetic number, because the mean of its divisors is an integer number (28417575084).

Almost surely, 2^85252725249 is an apocalyptic number.

It is an amenable number.

85252725249 is a deficient number, since it is larger than the sum of its proper divisors (28417575087).

85252725249 is a wasteful number, since it uses less digits than its factorization.

85252725249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28417575086.

The product of its digits is 4032000, while the sum is 51.

Subtracting 85252725249 from its reverse (94252725258), we obtain a palindrome (9000000009).

The spelling of 85252725249 in words is "eighty-five billion, two hundred fifty-two million, seven hundred twenty-five thousand, two hundred forty-nine".