65165001561650 has 48 divisors (see below), whose sum is σ = 121470736194504. Its totient is φ = 26009316103680.

The previous prime is 65165001561617. The next prime is 65165001561661. The reversal of 65165001561650 is 5616510056156.

It can be written as a sum of positive squares in 12 ways, for example, as 31418278250401 + 33746723311249 = 5605201^2 + 5809193^2 .

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 65165001561595 and 65165001561604.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 47835344 + ... + 49178756.

Almost surely, 2^{65165001561650} is an apocalyptic number.

65165001561650 is a deficient number, since it is larger than the sum of its proper divisors (56305734632854).

65165001561650 is a wasteful number, since it uses less digits than its factorization.

65165001561650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1345535 (or 1345530 counting only the distinct ones).

The product of its (nonzero) digits is 810000, while the sum is 47.

The spelling of 65165001561650 in words is "sixty-five trillion, one hundred sixty-five billion, one million, five hundred sixty-one thousand, six hundred fifty".