153741705721 has 2 divisors, whose sum is σ = 153741705722. Its totient is φ = 153741705720.

The previous prime is 153741705713. The next prime is 153741705763. The reversal of 153741705721 is 127507147351.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 146221347321 + 7520358400 = 382389^2 + 86720^2 .

It is a cyclic number.

It is not a de Polignac number, because 153741705721 - 2³ = 153741705713 is a prime.

It is not a weakly prime, because it can be changed into another prime (153721705721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 76870852860 + 76870852861.

It is an arithmetic number, because the mean of its divisors is an integer number (76870852861).

Almost surely, 2^153741705721 is an apocalyptic number.

It is an amenable number.

153741705721 is a deficient number, since it is larger than the sum of its proper divisors (1).

153741705721 is an equidigital number, since it uses as much as digits as its factorization.

153741705721 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 205800, while the sum is 43.

The spelling of 153741705721 in words is "one hundred fifty-three billion, seven hundred forty-one million, seven hundred five thousand, seven hundred twenty-one".