65816374209 has 16 divisors (see below), whose sum is σ = 88666920960. Its totient is φ = 43423430400.

The previous prime is 65816374199. The next prime is 65816374271. The reversal of 65816374209 is 90247361856.

It is not a de Polignac number, because 65816374209 - 2⁹ = 65816373697 is a prime.

It is a super-2 number, since 2×65816374209² (a number of 22 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (65816374279) 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, 62614 + ... + 368175.

It is an arithmetic number, because the mean of its divisors is an integer number (5541682560).

It is a 1-persistent number, because it is pandigital, but 2⋅65816374209 = 131632748418 is not.

Almost surely, 2^65816374209 is an apocalyptic number.

It is an amenable number.

65816374209 is a deficient number, since it is larger than the sum of its proper divisors (22850546751).

65816374209 is a wasteful number, since it uses less digits than its factorization.

65816374209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 431320.

The product of its (nonzero) digits is 2177280, while the sum is 51.

The spelling of 65816374209 in words is "sixty-five billion, eight hundred sixteen million, three hundred seventy-four thousand, two hundred nine".