1722606265640 has 64 divisors (see below), whose sum is σ = 4174153376400. Its totient is φ = 636017006592.

The previous prime is 1722606265619. The next prime is 1722606265649. The reversal of 1722606265640 is 465626062271.

It can be written as a sum of positive squares in 8 ways, for example, as 1510455748036 + 212150517604 = 1229006^2 + 460598^2 .

It is a super-4 number, since 4×1722606265640⁴ (a number of 50 digits) contains 4444 as substring.

It is not an unprimeable number, because it can be changed into a prime (1722606265649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26837906 + ... + 26902014.

Almost surely, 2^{1722606265640} is an apocalyptic number.

1722606265640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1722606265640 is an abundant number, since it is smaller than the sum of its proper divisors (2451547110760).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1722606265640 is a wasteful number, since it uses less digits than its factorization.

1722606265640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115806 (or 115802 counting only the distinct ones).

The product of its (nonzero) digits is 1451520, while the sum is 47.

The spelling of 1722606265640 in words is "one trillion, seven hundred twenty-two billion, six hundred six million, two hundred sixty-five thousand, six hundred forty".