65161051646 has 64 divisors (see below), whose sum is σ = 114359454720. Its totient is φ = 27619637760.

The previous prime is 65161051619. The next prime is 65161051649. The reversal of 65161051646 is 64615016156.

It is a super-2 number, since 2×65161051646² (a number of 22 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65161051649) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2468156 + ... + 2494416.

It is an arithmetic number, because the mean of its divisors is an integer number (1786866480).

Almost surely, 2^65161051646 is an apocalyptic number.

65161051646 is a deficient number, since it is larger than the sum of its proper divisors (49198403074).

65161051646 is a wasteful number, since it uses less digits than its factorization.

65161051646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26489.

The product of its (nonzero) digits is 129600, while the sum is 41.

The spelling of 65161051646 in words is "sixty-five billion, one hundred sixty-one million, fifty-one thousand, six hundred forty-six".