65043974281 has 32 divisors (see below), whose sum is σ = 77592493440. Its totient is φ = 53747712000.

The previous prime is 65043974269. The next prime is 65043974297. The reversal of 65043974281 is 18247934056.

It is a happy number.

It is a 8-Lehmer number, since φ(65043974281) divides (65043974281-1)⁸.

It is a cyclic number.

It is not a de Polignac number, because 65043974281 - 2²⁵ = 65010419849 is a prime.

It is a super-2 number, since 2×65043974281² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (65043974221) 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, 2527881 + ... + 2553481.

It is an arithmetic number, because the mean of its divisors is an integer number (2424765420).

It is a 2-persistent number, because it is pandigital, and so is 2⋅65043974281 = 130087948562, but 3⋅65043974281 = 195131922843 is not.

Almost surely, 2^65043974281 is an apocalyptic number.

It is an amenable number.

65043974281 is a deficient number, since it is larger than the sum of its proper divisors (12548519159).

65043974281 is a wasteful number, since it uses less digits than its factorization.

65043974281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25897.

The product of its (nonzero) digits is 1451520, while the sum is 49.

The spelling of 65043974281 in words is "sixty-five billion, forty-three million, nine hundred seventy-four thousand, two hundred eighty-one".