16819412925 has 72 divisors (see below), whose sum is σ = 32651276256. Its totient is φ = 7616837760.

The previous prime is 16819412861. The next prime is 16819412947. The reversal of 16819412925 is 52921491861.

It is not a de Polignac number, because 16819412925 - 2⁶ = 16819412861 is a prime.

It is a super-2 number, since 2×16819412925² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 371839 + ... + 414611.

It is an arithmetic number, because the mean of its divisors is an integer number (453489948).

Almost surely, 2^16819412925 is an apocalyptic number.

16819412925 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

16819412925 is a deficient number, since it is larger than the sum of its proper divisors (15831863331).

16819412925 is a wasteful number, since it uses less digits than its factorization.

16819412925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42907 (or 42895 counting only the distinct ones).

The product of its digits is 311040, while the sum is 48.

The spelling of 16819412925 in words is "sixteen billion, eight hundred nineteen million, four hundred twelve thousand, nine hundred twenty-five".