16451521033 has 2 divisors, whose sum is σ = 16451521034. Its totient is φ = 16451521032.

The previous prime is 16451521019. The next prime is 16451521043. The reversal of 16451521033 is 33012515461.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16253190144 + 198330889 = 127488^2 + 14083^2 .

It is a cyclic number.

It is not a de Polignac number, because 16451521033 - 2²⁹ = 15914650121 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 16451520986 and 16451521004.

It is not a weakly prime, because it can be changed into another prime (16451521003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8225760516 + 8225760517.

It is an arithmetic number, because the mean of its divisors is an integer number (8225760517).

Almost surely, 2^16451521033 is an apocalyptic number.

It is an amenable number.

16451521033 is a deficient number, since it is larger than the sum of its proper divisors (1).

16451521033 is an equidigital number, since it uses as much as digits as its factorization.

16451521033 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10800, while the sum is 31.

The spelling of 16451521033 in words is "sixteen billion, four hundred fifty-one million, five hundred twenty-one thousand, thirty-three".