163878449479 has 2 divisors, whose sum is σ = 163878449480. Its totient is φ = 163878449478.

The previous prime is 163878449461. The next prime is 163878449503. The reversal of 163878449479 is 974944878361.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 163878449479 - 2¹⁹ = 163877925191 is a prime.

It is a super-2 number, since 2×163878449479² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (163878443479) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81939224739 + 81939224740.

It is an arithmetic number, because the mean of its divisors is an integer number (81939224740).

Almost surely, 2^163878449479 is an apocalyptic number.

163878449479 is a deficient number, since it is larger than the sum of its proper divisors (1).

163878449479 is an equidigital number, since it uses as much as digits as its factorization.

163878449479 is an evil number, because the sum of its binary digits is even.

The product of its digits is 292626432, while the sum is 70.

The spelling of 163878449479 in words is "one hundred sixty-three billion, eight hundred seventy-eight million, four hundred forty-nine thousand, four hundred seventy-nine".