65640010050 has 36 divisors (see below), whose sum is σ = 176352828210. Its totient is φ = 17504002560.

The previous prime is 65640010039. The next prime is 65640010097. The reversal of 65640010050 is 5001004656.

It is a happy number.

65640010050 is a `hidden beast` number, since 6 + 5 + 640 + 0 + 10 + 0 + 5 + 0 = 666.

It can be written as a sum of positive squares in 3 ways, for example, as 44151675129 + 21488334921 = 210123^2 + 146589^2 .

It is a super-2 number, since 2×65640010050² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 65640009996 and 65640010023.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 72932895 + ... + 72933794.

Almost surely, 2^65640010050 is an apocalyptic number.

65640010050 is an abundant number, since it is smaller than the sum of its proper divisors (110712818160).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

65640010050 is a wasteful number, since it uses less digits than its factorization.

65640010050 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145866707 (or 145866699 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The spelling of 65640010050 in words is "sixty-five billion, six hundred forty million, ten thousand, fifty".