2505159336721 has 2 divisors, whose sum is σ = 2505159336722. Its totient is φ = 2505159336720.

The previous prime is 2505159336683. The next prime is 2505159336727. The reversal of 2505159336721 is 1276339515052.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2367043790400 + 138115546321 = 1538520^2 + 371639^2 .

It is a cyclic number.

It is not a de Polignac number, because 2505159336721 - 2¹⁵ = 2505159303953 is a prime.

It is not a weakly prime, because it can be changed into another prime (2505159336727) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1252579668360 + 1252579668361.

It is an arithmetic number, because the mean of its divisors is an integer number (1252579668361).

Almost surely, 2^{2505159336721} is an apocalyptic number.

It is an amenable number.

2505159336721 is a deficient number, since it is larger than the sum of its proper divisors (1).

2505159336721 is an equidigital number, since it uses as much as digits as its factorization.

2505159336721 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1701000, while the sum is 49.

The spelling of 2505159336721 in words is "two trillion, five hundred five billion, one hundred fifty-nine million, three hundred thirty-six thousand, seven hundred twenty-one".