245727221461 has 2 divisors, whose sum is σ = 245727221462. Its totient is φ = 245727221460.

The previous prime is 245727221449. The next prime is 245727221489. The reversal of 245727221461 is 164122727542.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 238540420836 + 7186800625 = 488406^2 + 84775^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-245727221461 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (245727221401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122863610730 + 122863610731.

It is an arithmetic number, because the mean of its divisors is an integer number (122863610731).

Almost surely, 2^245727221461 is an apocalyptic number.

It is an amenable number.

245727221461 is a deficient number, since it is larger than the sum of its proper divisors (1).

245727221461 is an equidigital number, since it uses as much as digits as its factorization.

245727221461 is an evil number, because the sum of its binary digits is even.

The product of its digits is 376320, while the sum is 43.

The spelling of 245727221461 in words is "two hundred forty-five billion, seven hundred twenty-seven million, two hundred twenty-one thousand, four hundred sixty-one".