65897643305 has 64 divisors (see below), whose sum is σ = 87673259520. Its totient is φ = 47252975616.

The previous prime is 65897643293. The next prime is 65897643307. The reversal of 65897643305 is 50334679856.

It is a cyclic number.

It is not a de Polignac number, because 65897643305 - 2⁶ = 65897643241 is a prime.

It is a super-2 number, since 2×65897643305² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (65897643307) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 176669099 + ... + 176669471.

It is an arithmetic number, because the mean of its divisors is an integer number (1369894680).

Almost surely, 2^65897643305 is an apocalyptic number.

65897643305 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

65897643305 is a deficient number, since it is larger than the sum of its proper divisors (21775616215).

65897643305 is a wasteful number, since it uses less digits than its factorization.

65897643305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 930.

The product of its (nonzero) digits is 16329600, while the sum is 56.

The spelling of 65897643305 in words is "sixty-five billion, eight hundred ninety-seven million, six hundred forty-three thousand, three hundred five".