65836507850 has 12 divisors (see below), whose sum is σ = 122455904694. Its totient is φ = 26334603120.

The previous prime is 65836507739. The next prime is 65836507853. The reversal of 65836507850 is 5870563856.

It can be written as a sum of positive squares in 3 ways, for example, as 55318569601 + 10517938249 = 235199^2 + 102557^2 .

It is a super-2 number, since 2×65836507850² (a number of 22 digits) contains 22 as substring.

It is an alternating number because its digits alternate between even and odd.

It is a junction number, because it is equal to n+sod(n) for n = 65836507792 and 65836507801.

It is not an unprimeable number, because it can be changed into a prime (65836507853) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 658365029 + ... + 658365128.

Almost surely, 2^65836507850 is an apocalyptic number.

65836507850 is a deficient number, since it is larger than the sum of its proper divisors (56619396844).

65836507850 is a wasteful number, since it uses less digits than its factorization.

65836507850 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1316730169 (or 1316730164 counting only the distinct ones).

The product of its (nonzero) digits is 6048000, while the sum is 53.

The spelling of 65836507850 in words is "sixty-five billion, eight hundred thirty-six million, five hundred seven thousand, eight hundred fifty".