16683433425 has 36 divisors (see below), whose sum is σ = 29913174720. Its totient is φ = 8888513760.

The previous prime is 16683433391. The next prime is 16683433441. The reversal of 16683433425 is 52433438661.

16683433425 is a `hidden beast` number, since 166 + 8 + 34 + 33 + 425 = 666.

It is not a de Polignac number, because 16683433425 - 2²⁸ = 16414997969 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 179236 + ... + 255914.

It is an arithmetic number, because the mean of its divisors is an integer number (830921520).

Almost surely, 2^16683433425 is an apocalyptic number.

16683433425 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

16683433425 is a deficient number, since it is larger than the sum of its proper divisors (13229741295).

16683433425 is a wasteful number, since it uses less digits than its factorization.

16683433425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77662 (or 77654 counting only the distinct ones).

The product of its digits is 1244160, while the sum is 45.

The spelling of 16683433425 in words is "sixteen billion, six hundred eighty-three million, four hundred thirty-three thousand, four hundred twenty-five".