61580980984321 has 4 divisors (see below), whose sum is σ = 62424556066372. Its totient is φ = 60737405902272.

The previous prime is 61580980984301. The next prime is 61580980984331. The reversal of 61580980984321 is 12348908908516.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 50754011914225 + 10826969070096 = 7124185^2 + 3290436^2 .

It is a cyclic number.

It is not a de Polignac number, because 61580980984321 - 2¹⁹ = 61580980460033 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61580980984301) 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 3 ways as a sum of consecutive naturals, for example, 421787540916 + ... + 421787541061.

It is an arithmetic number, because the mean of its divisors is an integer number (15606139016593).

Almost surely, 2^{61580980984321} is an apocalyptic number.

It is an amenable number.

61580980984321 is a deficient number, since it is larger than the sum of its proper divisors (843575082051).

61580980984321 is an equidigital number, since it uses as much as digits as its factorization.

61580980984321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 843575082050.

The product of its (nonzero) digits is 29859840, while the sum is 64.

The spelling of 61580980984321 in words is "sixty-one trillion, five hundred eighty billion, nine hundred eighty million, nine hundred eighty-four thousand, three hundred twenty-one".