1721411736061 has 8 divisors (see below), whose sum is σ = 1726474751480. Its totient is φ = 1716352374528.

The previous prime is 1721411736041. The next prime is 1721411736097. The reversal of 1721411736061 is 1606371141271.

It can be written as a sum of positive squares in 4 ways, for example, as 39073033561 + 1682338702500 = 197669^2 + 1297050^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1721411736061 - 2¹¹ = 1721411734013 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 (1721411736041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31585 + ... + 1855753.

It is an arithmetic number, because the mean of its divisors is an integer number (215809343935).

Almost surely, 2^{1721411736061} is an apocalyptic number.

It is an amenable number.

1721411736061 is a deficient number, since it is larger than the sum of its proper divisors (5063015419).

1721411736061 is a wasteful number, since it uses less digits than its factorization.

1721411736061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1826943.

The product of its (nonzero) digits is 42336, while the sum is 40.

The spelling of 1721411736061 in words is "one trillion, seven hundred twenty-one billion, four hundred eleven million, seven hundred thirty-six thousand, sixty-one".