65722221719 has 48 divisors (see below), whose sum is σ = 88464182400. Its totient is φ = 48145406400.

The previous prime is 65722221701. The next prime is 65722221727. The reversal of 65722221719 is 91712222756.

It is not a de Polignac number, because 65722221719 - 2²⁰ = 65721173143 is a prime.

It is a super-2 number, since 2×65722221719² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 65722221719.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65722220719) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1317077 + ... + 1366065.

It is an arithmetic number, because the mean of its divisors is an integer number (1843003800).

Almost surely, 2^65722221719 is an apocalyptic number.

65722221719 is a deficient number, since it is larger than the sum of its proper divisors (22741960681).

65722221719 is a wasteful number, since it uses less digits than its factorization.

65722221719 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49164 (or 49157 counting only the distinct ones).

The product of its digits is 211680, while the sum is 44.

The spelling of 65722221719 in words is "sixty-five billion, seven hundred twenty-two million, two hundred twenty-one thousand, seven hundred nineteen".