163475867749 has 2 divisors, whose sum is σ = 163475867750. Its totient is φ = 163475867748.

The previous prime is 163475867743. The next prime is 163475867813. The reversal of 163475867749 is 947768574361.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 102265644100 + 61210223649 = 319790^2 + 247407^2 .

It is a cyclic number.

It is not a de Polignac number, because 163475867749 - 2⁹ = 163475867237 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (163475867743) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81737933874 + 81737933875.

It is an arithmetic number, because the mean of its divisors is an integer number (81737933875).

Almost surely, 2^163475867749 is an apocalyptic number.

It is an amenable number.

163475867749 is a deficient number, since it is larger than the sum of its proper divisors (1).

163475867749 is an equidigital number, since it uses as much as digits as its factorization.

163475867749 is an evil number, because the sum of its binary digits is even.

The product of its digits is 213373440, while the sum is 67.

The spelling of 163475867749 in words is "one hundred sixty-three billion, four hundred seventy-five million, eight hundred sixty-seven thousand, seven hundred forty-nine".