16214556825 has 36 divisors (see below), whose sum is σ = 29168986860. Its totient is φ = 8609973120.

The previous prime is 16214556817. The next prime is 16214556829. The reversal of 16214556825 is 52865541261.

16214556825 is a `hidden beast` number, since 1 + 6 + 2 + 14 + 556 + 82 + 5 = 666.

It can be written as a sum of positive squares in 6 ways, for example, as 11048976 + 16203507849 = 3324^2 + 127293^2 .

It is not a de Polignac number, because 16214556825 - 2³ = 16214556817 is a prime.

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

It is not an unprimeable number, because it can be changed into a prime (16214556829) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 105822 + ... + 208871.

It is an arithmetic number, because the mean of its divisors is an integer number (810249635).

Almost surely, 2^16214556825 is an apocalyptic number.

16214556825 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

16214556825 is a deficient number, since it is larger than the sum of its proper divisors (12954430035).

16214556825 is a wasteful number, since it uses less digits than its factorization.

16214556825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 314938 (or 314930 counting only the distinct ones).

The product of its digits is 576000, while the sum is 45.

The spelling of 16214556825 in words is "sixteen billion, two hundred fourteen million, five hundred fifty-six thousand, eight hundred twenty-five".