163948677149 has 2 divisors, whose sum is σ = 163948677150. Its totient is φ = 163948677148.

The previous prime is 163948677131. The next prime is 163948677157. The reversal of 163948677149 is 941776849361.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 99080152900 + 64868524249 = 314770^2 + 254693^2 .

It is a cyclic number.

It is not a de Polignac number, because 163948677149 - 2²⁴ = 163931899933 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (163948677199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81974338574 + 81974338575.

It is an arithmetic number, because the mean of its divisors is an integer number (81974338575).

Almost surely, 2^163948677149 is an apocalyptic number.

It is an amenable number.

163948677149 is a deficient number, since it is larger than the sum of its proper divisors (1).

163948677149 is an equidigital number, since it uses as much as digits as its factorization.

163948677149 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 54867456, while the sum is 65.

The spelling of 163948677149 in words is "one hundred sixty-three billion, nine hundred forty-eight million, six hundred seventy-seven thousand, one hundred forty-nine".