61040243002321 has 24 divisors (see below), whose sum is σ = 68478220542312. Its totient is φ = 54349767014400.

The previous prime is 61040243002301. The next prime is 61040243002337. The reversal of 61040243002321 is 12320034204016.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 35639288118225 + 25400954884096 = 5969865^2 + 5039936^2 .

It is not a de Polignac number, because 61040243002321 - 2²⁷ = 61040108784593 is a prime.

It is a super-2 number, since 2×61040243002321² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 61040243002321.

It is not an unprimeable number, because it can be changed into a prime (61040243002301) 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 23 ways as a sum of consecutive naturals, for example, 4547710 + ... + 11948311.

It is an arithmetic number, because the mean of its divisors is an integer number (2853259189263).

Almost surely, 2^{61040243002321} is an apocalyptic number.

It is an amenable number.

61040243002321 is a deficient number, since it is larger than the sum of its proper divisors (7437977539991).

61040243002321 is a wasteful number, since it uses less digits than its factorization.

61040243002321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16496673 (or 16496662 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 28.

Adding to 61040243002321 its reverse (12320034204016), we get a palindrome (73360277206337).

The spelling of 61040243002321 in words is "sixty-one trillion, forty billion, two hundred forty-three million, two thousand, three hundred twenty-one".