253665243061 has 2 divisors, whose sum is σ = 253665243062. Its totient is φ = 253665243060.

The previous prime is 253665243049. The next prime is 253665243067. The reversal of 253665243061 is 160342566352.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 253638140625 + 27102436 = 503625^2 + 5206^2 .

It is a cyclic number.

It is not a de Polignac number, because 253665243061 - 2⁷ = 253665242933 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 253665242999 and 253665243017.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (253665243067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126832621530 + 126832621531.

It is an arithmetic number, because the mean of its divisors is an integer number (126832621531).

Almost surely, 2^253665243061 is an apocalyptic number.

It is an amenable number.

253665243061 is a deficient number, since it is larger than the sum of its proper divisors (1).

253665243061 is an equidigital number, since it uses as much as digits as its factorization.

253665243061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 777600, while the sum is 43.

The spelling of 253665243061 in words is "two hundred fifty-three billion, six hundred sixty-five million, two hundred forty-three thousand, sixty-one".