16425632989 has 2 divisors, whose sum is σ = 16425632990. Its totient is φ = 16425632988.

The previous prime is 16425632987. The next prime is 16425633013. The reversal of 16425632989 is 98923652461.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15383440900 + 1042192089 = 124030^2 + 32283^2 .

It is a cyclic number.

It is not a de Polignac number, because 16425632989 - 2¹ = 16425632987 is a prime.

It is a super-3 number, since 3×16425632989³ (a number of 32 digits) contains 333 as substring.

Together with 16425632987, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16425632987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8212816494 + 8212816495.

It is an arithmetic number, because the mean of its divisors is an integer number (8212816495).

Almost surely, 2^16425632989 is an apocalyptic number.

It is an amenable number.

16425632989 is a deficient number, since it is larger than the sum of its proper divisors (1).

16425632989 is an equidigital number, since it uses as much as digits as its factorization.

16425632989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5598720, while the sum is 55.

The spelling of 16425632989 in words is "sixteen billion, four hundred twenty-five million, six hundred thirty-two thousand, nine hundred eighty-nine".