16453226811421 has 2 divisors, whose sum is σ = 16453226811422. Its totient is φ = 16453226811420.

The previous prime is 16453226811391. The next prime is 16453226811443. The reversal of 16453226811421 is 12411862235461.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14481533422521 + 1971693388900 = 3805461^2 + 1404170^2 .

It is a cyclic number.

It is not a de Polignac number, because 16453226811421 - 2⁷ = 16453226811293 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16453226811451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8226613405710 + 8226613405711.

It is an arithmetic number, because the mean of its divisors is an integer number (8226613405711).

Almost surely, 2^{16453226811421} is an apocalyptic number.

It is an amenable number.

16453226811421 is a deficient number, since it is larger than the sum of its proper divisors (1).

16453226811421 is an equidigital number, since it uses as much as digits as its factorization.

16453226811421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 552960, while the sum is 46.

The spelling of 16453226811421 in words is "sixteen trillion, four hundred fifty-three billion, two hundred twenty-six million, eight hundred eleven thousand, four hundred twenty-one".