238511068561 has 2 divisors, whose sum is σ = 238511068562. Its totient is φ = 238511068560.

The previous prime is 238511068493. The next prime is 238511068597. The reversal of 238511068561 is 165860115832.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 236931403536 + 1579665025 = 486756^2 + 39745^2 .

It is a cyclic number.

It is not a de Polignac number, because 238511068561 - 2¹⁹ = 238510544273 is a prime.

It is a super-2 number, since 2×238511068561² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (238511063561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 119255534280 + 119255534281.

It is an arithmetic number, because the mean of its divisors is an integer number (119255534281).

Almost surely, 2^238511068561 is an apocalyptic number.

It is an amenable number.

238511068561 is a deficient number, since it is larger than the sum of its proper divisors (1).

238511068561 is an equidigital number, since it uses as much as digits as its factorization.

238511068561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 345600, while the sum is 46.

The spelling of 238511068561 in words is "two hundred thirty-eight billion, five hundred eleven million, sixty-eight thousand, five hundred sixty-one".