649711727419 has 4 divisors (see below), whose sum is σ = 687930064344. Its totient is φ = 611493390496.

The previous prime is 649711727393. The next prime is 649711727449. The reversal of 649711727419 is 914727117946.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 914727117946 = 2 ⋅457363558973.

It is a cyclic number.

It is not a de Polignac number, because 649711727419 - 2¹³ = 649711719227 is a prime.

It is a super-2 number, since 2×649711727419² (a number of 24 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (649711727449) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19109168437 + ... + 19109168470.

It is an arithmetic number, because the mean of its divisors is an integer number (171982516086).

Almost surely, 2^649711727419 is an apocalyptic number.

649711727419 is a deficient number, since it is larger than the sum of its proper divisors (38218336925).

649711727419 is a wasteful number, since it uses less digits than its factorization.

649711727419 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38218336924.

The product of its digits is 5334336, while the sum is 58.

The spelling of 649711727419 in words is "six hundred forty-nine billion, seven hundred eleven million, seven hundred twenty-seven thousand, four hundred nineteen".