85851251764 has 24 divisors (see below), whose sum is σ = 150936851520. Its totient is φ = 42726565824.

The previous prime is 85851251741. The next prime is 85851251807. The reversal of 85851251764 is 46715215858.

It is a happy number.

It is a super-2 number, since 2×85851251764² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2970817 + ... + 2999575.

It is an arithmetic number, because the mean of its divisors is an integer number (6289035480).

Almost surely, 2^85851251764 is an apocalyptic number.

It is an amenable number.

85851251764 is a deficient number, since it is larger than the sum of its proper divisors (65085599756).

85851251764 is a wasteful number, since it uses less digits than its factorization.

85851251764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32199 (or 32197 counting only the distinct ones).

The product of its digits is 2688000, while the sum is 52.

The spelling of 85851251764 in words is "eighty-five billion, eight hundred fifty-one million, two hundred fifty-one thousand, seven hundred sixty-four".