61152822280721 has 2 divisors, whose sum is σ = 61152822280722. Its totient is φ = 61152822280720.

The previous prime is 61152822280703. The next prime is 61152822280763. The reversal of 61152822280721 is 12708222825116.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 60485228700625 + 667593580096 = 7777225^2 + 817064^2 .

It is a cyclic number.

It is not a de Polignac number, because 61152822280721 - 2¹⁸ = 61152822018577 is a prime.

It is not a weakly prime, because it can be changed into another prime (61152822280421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30576411140360 + 30576411140361.

It is an arithmetic number, because the mean of its divisors is an integer number (30576411140361).

Almost surely, 2^{61152822280721} is an apocalyptic number.

It is an amenable number.

61152822280721 is a deficient number, since it is larger than the sum of its proper divisors (1).

61152822280721 is an equidigital number, since it uses as much as digits as its factorization.

61152822280721 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 430080, while the sum is 47.

The spelling of 61152822280721 in words is "sixty-one trillion, one hundred fifty-two billion, eight hundred twenty-two million, two hundred eighty thousand, seven hundred twenty-one".