245447177749 has 2 divisors, whose sum is σ = 245447177750. Its totient is φ = 245447177748.

The previous prime is 245447177737. The next prime is 245447177783. The reversal of 245447177749 is 947771744542.

245447177749 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 223911615249 + 21535562500 = 473193^2 + 146750^2 .

It is a cyclic number.

It is not a de Polignac number, because 245447177749 - 2¹⁵ = 245447144981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (245447127749) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122723588874 + 122723588875.

It is an arithmetic number, because the mean of its divisors is an integer number (122723588875).

Almost surely, 2^245447177749 is an apocalyptic number.

It is an amenable number.

245447177749 is a deficient number, since it is larger than the sum of its proper divisors (1).

245447177749 is an equidigital number, since it uses as much as digits as its factorization.

245447177749 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 55319040, while the sum is 61.

The spelling of 245447177749 in words is "two hundred forty-five billion, four hundred forty-seven million, one hundred seventy-seven thousand, seven hundred forty-nine".