163068947621 has 2 divisors, whose sum is σ = 163068947622. Its totient is φ = 163068947620.

The previous prime is 163068947617. The next prime is 163068947651. The reversal of 163068947621 is 126749860361.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 94156922500 + 68912025121 = 306850^2 + 262511^2 .

It is a cyclic number.

It is not a de Polignac number, because 163068947621 - 2² = 163068947617 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (163068947651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81534473810 + 81534473811.

It is an arithmetic number, because the mean of its divisors is an integer number (81534473811).

Almost surely, 2^163068947621 is an apocalyptic number.

It is an amenable number.

163068947621 is a deficient number, since it is larger than the sum of its proper divisors (1).

163068947621 is an equidigital number, since it uses as much as digits as its factorization.

163068947621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2612736, while the sum is 53.

The spelling of 163068947621 in words is "one hundred sixty-three billion, sixty-eight million, nine hundred forty-seven thousand, six hundred twenty-one".