1720674444541 has 6 divisors (see below), whose sum is σ = 1863215522970. Its totient is φ = 1588314871728.

The previous prime is 1720674444499. The next prime is 1720674444647. The reversal of 1720674444541 is 1454444760271.

It can be written as a sum of positive squares in 3 ways, for example, as 10987442041 + 1709687002500 = 104821^2 + 1307550^2 .

It is not a de Polignac number, because 1720674444541 - 2¹⁷ = 1720674313469 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 (1720674448541) 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 5 ways as a sum of consecutive naturals, for example, 5090752626 + ... + 5090752963.

It is an arithmetic number, because the mean of its divisors is an integer number (310535920495).

Almost surely, 2^{1720674444541} is an apocalyptic number.

It is an amenable number.

1720674444541 is a deficient number, since it is larger than the sum of its proper divisors (142541078429).

1720674444541 is a wasteful number, since it uses less digits than its factorization.

1720674444541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10181505615 (or 10181505602 counting only the distinct ones).

The product of its (nonzero) digits is 3010560, while the sum is 49.

The spelling of 1720674444541 in words is "one trillion, seven hundred twenty billion, six hundred seventy-four million, four hundred forty-four thousand, five hundred forty-one".