65873839681 has 16 divisors (see below), whose sum is σ = 71335180224. Its totient is φ = 60469101504.

The previous prime is 65873839657. The next prime is 65873839721. The reversal of 65873839681 is 18693837856.

It is a cyclic number.

It is not a de Polignac number, because 65873839681 - 2¹³ = 65873831489 is a prime.

It is a super-2 number, since 2×65873839681² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65873830681) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6866370 + ... + 6875956.

It is an arithmetic number, because the mean of its divisors is an integer number (4458448764).

Almost surely, 2^65873839681 is an apocalyptic number.

It is an amenable number.

65873839681 is a deficient number, since it is larger than the sum of its proper divisors (5461340543).

65873839681 is a wasteful number, since it uses less digits than its factorization.

65873839681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12480.

The product of its digits is 52254720, while the sum is 64.

The spelling of 65873839681 in words is "sixty-five billion, eight hundred seventy-three million, eight hundred thirty-nine thousand, six hundred eighty-one".