6469956919321 has 9 divisors (see below), whose sum is σ = 7526297128671. Its totient is φ = 5545662097752.

The previous prime is 6469956919271. The next prime is 6469956919339. The reversal of 6469956919321 is 1239196599646.

The square root of 6469956919321 is 2543611.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 4833512175625 + 1636444743696 = 2198525^2 + 1279236^2 .

It is not a de Polignac number, because 6469956919321 - 2¹⁷ = 6469956788249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6469956919021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 17623591 + ... + 17986963.

It is an arithmetic number, because the mean of its divisors is an integer number (836255236519).

Almost surely, 2^{6469956919321} is an apocalyptic number.

6469956919321 is the 2543611-st square number.

6469956919321 is the 1271806-th centered octagonal number.

It is an amenable number.

6469956919321 is a deficient number, since it is larger than the sum of its proper divisors (1056340209350).

6469956919321 is an frugal number, since it uses more digits than its factorization.

6469956919321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 726760 (or 363380 counting only the distinct ones).

The product of its digits is 170061120, while the sum is 70.

The spelling of 6469956919321 in words is "six trillion, four hundred sixty-nine billion, nine hundred fifty-six million, nine hundred nineteen thousand, three hundred twenty-one".