2653428499721 has 2 divisors, whose sum is σ = 2653428499722. Its totient is φ = 2653428499720.

The previous prime is 2653428499649. The next prime is 2653428499751. The reversal of 2653428499721 is 1279948243562.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2649198948496 + 4229551225 = 1627636^2 + 65035^2 .

It is a cyclic number.

It is not a de Polignac number, because 2653428499721 - 2¹⁰ = 2653428498697 is a prime.

It is not a weakly prime, because it can be changed into another prime (2653428499751) 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 as a sum of consecutive naturals, namely, 1326714249860 + 1326714249861.

It is an arithmetic number, because the mean of its divisors is an integer number (1326714249861).

Almost surely, 2^{2653428499721} is an apocalyptic number.

It is an amenable number.

2653428499721 is a deficient number, since it is larger than the sum of its proper divisors (1).

2653428499721 is an equidigital number, since it uses as much as digits as its factorization.

2653428499721 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 52254720, while the sum is 62.

The spelling of 2653428499721 in words is "two trillion, six hundred fifty-three billion, four hundred twenty-eight million, four hundred ninety-nine thousand, seven hundred twenty-one".