163617673537 has 2 divisors, whose sum is σ = 163617673538. Its totient is φ = 163617673536.

The previous prime is 163617673529. The next prime is 163617673567. The reversal of 163617673537 is 735376716361.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 163219232016 + 398441521 = 404004^2 + 19961^2 .

It is a cyclic number.

It is not a de Polignac number, because 163617673537 - 2³ = 163617673529 is a prime.

It is not a weakly prime, because it can be changed into another prime (163617673517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81808836768 + 81808836769.

It is an arithmetic number, because the mean of its divisors is an integer number (81808836769).

Almost surely, 2^163617673537 is an apocalyptic number.

It is an amenable number.

163617673537 is a deficient number, since it is larger than the sum of its proper divisors (1).

163617673537 is an equidigital number, since it uses as much as digits as its factorization.

163617673537 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10001880, while the sum is 55.

The spelling of 163617673537 in words is "one hundred sixty-three billion, six hundred seventeen million, six hundred seventy-three thousand, five hundred thirty-seven".