163121322077 has 6 divisors (see below), whose sum is σ = 189753374718. Its totient is φ = 139818276024.

The previous prime is 163121322043. The next prime is 163121322127. The reversal of 163121322077 is 770223121361.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 118794651556 + 44326670521 = 344666^2 + 210539^2 .

It is not a de Polignac number, because 163121322077 - 2⁸ = 163121321821 is a prime.

It is a super-2 number, since 2×163121322077² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163121322577) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1664503238 + ... + 1664503335.

It is an arithmetic number, because the mean of its divisors is an integer number (31625562453).

Almost surely, 2^163121322077 is an apocalyptic number.

It is an amenable number.

163121322077 is a deficient number, since it is larger than the sum of its proper divisors (26632052641).

163121322077 is an equidigital number, since it uses as much as digits as its factorization.

163121322077 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3329006587 (or 3329006580 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 35.

The spelling of 163121322077 in words is "one hundred sixty-three billion, one hundred twenty-one million, three hundred twenty-two thousand, seventy-seven".