16328291425 has 12 divisors (see below), whose sum is σ = 20524440940. Its totient is φ = 12883691520.

The previous prime is 16328291423. The next prime is 16328291513. The reversal of 16328291425 is 52419282361.

It can be written as a sum of positive squares in 6 ways, for example, as 200307409 + 16127984016 = 14153^2 + 126996^2 .

It is not a de Polignac number, because 16328291425 - 2¹ = 16328291423 is a prime.

It is a super-2 number, since 2×16328291425² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (16328291423) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4471680 + ... + 4475329.

Almost surely, 2^16328291425 is an apocalyptic number.

It is an amenable number.

16328291425 is a deficient number, since it is larger than the sum of its proper divisors (4196149515).

16328291425 is an equidigital number, since it uses as much as digits as its factorization.

16328291425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8947092 (or 8947087 counting only the distinct ones).

The product of its digits is 207360, while the sum is 43.

The spelling of 16328291425 in words is "sixteen billion, three hundred twenty-eight million, two hundred ninety-one thousand, four hundred twenty-five".