16401531425 has 12 divisors (see below), whose sum is σ = 20340849516. Its totient is φ = 13119321600.

The previous prime is 16401531401. The next prime is 16401531437. The reversal of 16401531425 is 52413510461.

It can be written as a sum of positive squares in 6 ways, for example, as 2813665936 + 13587865489 = 53044^2 + 116567^2 .

It is not a de Polignac number, because 16401531425 - 2⁶ = 16401531361 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16401531391 and 16401531400.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 143177 + ... + 230873.

It is an arithmetic number, because the mean of its divisors is an integer number (1695070793).

Almost surely, 2^16401531425 is an apocalyptic number.

It is an amenable number.

16401531425 is a deficient number, since it is larger than the sum of its proper divisors (3939318091).

16401531425 is an equidigital number, since it uses as much as digits as its factorization.

16401531425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95188 (or 95183 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 32.

The spelling of 16401531425 in words is "sixteen billion, four hundred one million, five hundred thirty-one thousand, four hundred twenty-five".