6719794515949 has 4 divisors (see below), whose sum is σ = 6720111194940. Its totient is φ = 6719477836960.

The previous prime is 6719794515947. The next prime is 6719794515971. The reversal of 6719794515949 is 9495154979176.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6273557155849 + 446237360100 = 2504707^2 + 668010^2 .

It is a cyclic number.

It is not a de Polignac number, because 6719794515949 - 2¹ = 6719794515947 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6719794515943) 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, 158307664 + ... + 158350105.

It is an arithmetic number, because the mean of its divisors is an integer number (1680027798735).

Almost surely, 2^{6719794515949} is an apocalyptic number.

It is an amenable number.

6719794515949 is a deficient number, since it is larger than the sum of its proper divisors (316678991).

6719794515949 is a wasteful number, since it uses less digits than its factorization.

6719794515949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 316678990.

The product of its digits is 771573600, while the sum is 76.

The spelling of 6719794515949 in words is "six trillion, seven hundred nineteen billion, seven hundred ninety-four million, five hundred fifteen thousand, nine hundred forty-nine".