16425946081 has 2 divisors, whose sum is σ = 16425946082. Its totient is φ = 16425946080.

The previous prime is 16425946049. The next prime is 16425946127. The reversal of 16425946081 is 18064952461.

It is a happy number.

It is an a-pointer prime, because the next prime (16425946127) can be obtained adding 16425946081 to its sum of digits (46).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14141966400 + 2283979681 = 118920^2 + 47791^2 .

It is an emirp because it is prime and its reverse (18064952461) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16425946081 - 2⁵ = 16425946049 is a prime.

It is a super-2 number, since 2×16425946081² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (16425946021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8212973040 + 8212973041.

It is an arithmetic number, because the mean of its divisors is an integer number (8212973041).

Almost surely, 2^16425946081 is an apocalyptic number.

It is an amenable number.

16425946081 is a deficient number, since it is larger than the sum of its proper divisors (1).

16425946081 is an equidigital number, since it uses as much as digits as its factorization.

16425946081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 414720, while the sum is 46.

The spelling of 16425946081 in words is "sixteen billion, four hundred twenty-five million, nine hundred forty-six thousand, eighty-one".