1949664528717 has 4 divisors (see below), whose sum is σ = 2599552704960. Its totient is φ = 1299776352476.

The previous prime is 1949664528689. The next prime is 1949664528727. The reversal of 1949664528717 is 7178254669491.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1949664528717 - 2¹⁹ = 1949664004429 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1949664528727) 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, 324944088117 + ... + 324944088122.

It is an arithmetic number, because the mean of its divisors is an integer number (649888176240).

Almost surely, 2^{1949664528717} is an apocalyptic number.

It is an amenable number.

1949664528717 is a deficient number, since it is larger than the sum of its proper divisors (649888176243).

1949664528717 is an equidigital number, since it uses as much as digits as its factorization.

1949664528717 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 649888176242.

The product of its digits is 182891520, while the sum is 69.

The spelling of 1949664528717 in words is "one trillion, nine hundred forty-nine billion, six hundred sixty-four million, five hundred twenty-eight thousand, seven hundred seventeen".