8256772538 has 48 divisors (see below), whose sum is σ = 14855806944. Its totient is φ = 3429709920.

The previous prime is 8256772501. The next prime is 8256772543. The reversal of 8256772538 is 8352776528.

It is a happy number.

It is a super-2 number, since 2×8256772538² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 8256772538.

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 23 ways as a sum of consecutive naturals, for example, 544556 + ... + 559512.

It is an arithmetic number, because the mean of its divisors is an integer number (309495978).

Almost surely, 2^8256772538 is an apocalyptic number.

8256772538 is a deficient number, since it is larger than the sum of its proper divisors (6599034406).

8256772538 is a wasteful number, since it uses less digits than its factorization.

8256772538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15147 (or 15140 counting only the distinct ones).

The product of its digits is 5644800, while the sum is 53.

The square root of 8256772538 is about 90866.7845695004. The cubic root of 8256772538 is about 2021.1727772950.

The spelling of 8256772538 in words is "eight billion, two hundred fifty-six million, seven hundred seventy-two thousand, five hundred thirty-eight".