169463894321 has 2 divisors, whose sum is σ = 169463894322. Its totient is φ = 169463894320.

The previous prime is 169463894311. The next prime is 169463894351. The reversal of 169463894321 is 123498364961.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 147524359921 + 21939534400 = 384089^2 + 148120^2 .

It is a cyclic number.

It is not a de Polignac number, because 169463894321 - 2²² = 169459700017 is a prime.

It is a super-2 number, since 2×169463894321² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (169463894311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84731947160 + 84731947161.

It is an arithmetic number, because the mean of its divisors is an integer number (84731947161).

Almost surely, 2^169463894321 is an apocalyptic number.

It is an amenable number.

169463894321 is a deficient number, since it is larger than the sum of its proper divisors (1).

169463894321 is an equidigital number, since it uses as much as digits as its factorization.

169463894321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6718464, while the sum is 56.

The spelling of 169463894321 in words is "one hundred sixty-nine billion, four hundred sixty-three million, eight hundred ninety-four thousand, three hundred twenty-one".