20061602725649 has 2 divisors, whose sum is σ = 20061602725650. Its totient is φ = 20061602725648.

The previous prime is 20061602725631. The next prime is 20061602725679. The reversal of 20061602725649 is 94652720616002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20061154345024 + 448380625 = 4478968^2 + 21175^2 .

It is a cyclic number.

It is not a de Polignac number, because 20061602725649 - 2¹² = 20061602721553 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20061602725597 and 20061602725606.

It is not a weakly prime, because it can be changed into another prime (20061602725679) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10030801362824 + 10030801362825.

It is an arithmetic number, because the mean of its divisors is an integer number (10030801362825).

Almost surely, 2^{20061602725649} is an apocalyptic number.

It is an amenable number.

20061602725649 is a deficient number, since it is larger than the sum of its proper divisors (1).

20061602725649 is an equidigital number, since it uses as much as digits as its factorization.

20061602725649 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2177280, while the sum is 50.

The spelling of 20061602725649 in words is "twenty trillion, sixty-one billion, six hundred two million, seven hundred twenty-five thousand, six hundred forty-nine".