16456436225 has 6 divisors (see below), whose sum is σ = 20405980950. Its totient is φ = 13165148960.

The previous prime is 16456436207. The next prime is 16456436233. The reversal of 16456436225 is 52263465461.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 864418801 + 15592017424 = 29401^2 + 124868^2 .

It is not a de Polignac number, because 16456436225 - 2¹² = 16456432129 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 329128700 + ... + 329128749.

It is an arithmetic number, because the mean of its divisors is an integer number (3400996825).

Almost surely, 2^16456436225 is an apocalyptic number.

It is an amenable number.

16456436225 is a deficient number, since it is larger than the sum of its proper divisors (3949544725).

16456436225 is an equidigital number, since it uses as much as digits as its factorization.

16456436225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 658257459 (or 658257454 counting only the distinct ones).

The product of its digits is 1036800, while the sum is 44.

The spelling of 16456436225 in words is "sixteen billion, four hundred fifty-six million, four hundred thirty-six thousand, two hundred twenty-five".