85765510251 has 6 divisors (see below), whose sum is σ = 123883514820. Its totient is φ = 57177006828.

The previous prime is 85765510211. The next prime is 85765510261. The reversal of 85765510251 is 15201556758.

85765510251 is a `hidden beast` number, since 8 + 5 + 76 + 551 + 0 + 25 + 1 = 666.

It is not a de Polignac number, because 85765510251 - 2¹¹ = 85765508203 is a prime.

It is a super-2 number, since 2×85765510251² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 85765510197 and 85765510206.

It is not an unprimeable number, because it can be changed into a prime (85765510211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4764750561 + ... + 4764750578.

It is an arithmetic number, because the mean of its divisors is an integer number (20647252470).

Almost surely, 2^85765510251 is an apocalyptic number.

85765510251 is a deficient number, since it is larger than the sum of its proper divisors (38118004569).

85765510251 is a wasteful number, since it uses less digits than its factorization.

85765510251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9529501145 (or 9529501142 counting only the distinct ones).

The product of its (nonzero) digits is 420000, while the sum is 45.

The spelling of 85765510251 in words is "eighty-five billion, seven hundred sixty-five million, five hundred ten thousand, two hundred fifty-one".