1645650241241 has 2 divisors, whose sum is σ = 1645650241242. Its totient is φ = 1645650241240.

The previous prime is 1645650241217. The next prime is 1645650241253. The reversal of 1645650241241 is 1421420565461.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1275950976400 + 369699264841 = 1129580^2 + 608029^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1645650241241 is a prime.

It is a super-2 number, since 2×1645650241241² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1645650241441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 822825120620 + 822825120621.

It is an arithmetic number, because the mean of its divisors is an integer number (822825120621).

Almost surely, 2^{1645650241241} is an apocalyptic number.

It is an amenable number.

1645650241241 is a deficient number, since it is larger than the sum of its proper divisors (1).

1645650241241 is an equidigital number, since it uses as much as digits as its factorization.

1645650241241 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 230400, while the sum is 41.

The spelling of 1645650241241 in words is "one trillion, six hundred forty-five billion, six hundred fifty million, two hundred forty-one thousand, two hundred forty-one".