245402252112181 has 2 divisors, whose sum is σ = 245402252112182. Its totient is φ = 245402252112180.

The previous prime is 245402252112109. The next prime is 245402252112197. The reversal of 245402252112181 is 181211252204542.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 222817269514225 + 22584982597956 = 14927065^2 + 4752366^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-245402252112181 is a prime.

It is a super-2 number, since 2×245402252112181² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (245402252152181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122701126056090 + 122701126056091.

It is an arithmetic number, because the mean of its divisors is an integer number (122701126056091).

Almost surely, 2^{245402252112181} is an apocalyptic number.

It is an amenable number.

245402252112181 is a deficient number, since it is larger than the sum of its proper divisors (1).

245402252112181 is an equidigital number, since it uses as much as digits as its factorization.

245402252112181 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 102400, while the sum is 40.

The spelling of 245402252112181 in words is "two hundred forty-five trillion, four hundred two billion, two hundred fifty-two million, one hundred twelve thousand, one hundred eighty-one".