2128199654 has 12 divisors (see below), whose sum is σ = 3713491404. Its totient is φ = 912085524.

The previous prime is 2128199651. The next prime is 2128199657. The reversal of 2128199654 is 4569918212.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (2128199651) and next prime (2128199657).

It is a super-4 number, since 4×2128199654⁴ (a number of 38 digits) contains 4444 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2128199599 and 2128199608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2128199651) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 10858064 + ... + 10858259.

It is an arithmetic number, because the mean of its divisors is an integer number (309457617).

Almost surely, 2^2128199654 is an apocalyptic number.

2128199654 is a deficient number, since it is larger than the sum of its proper divisors (1585291750).

2128199654 is a wasteful number, since it uses less digits than its factorization.

2128199654 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21716339 (or 21716332 counting only the distinct ones).

The product of its digits is 311040, while the sum is 47.

The square root of 2128199654 is about 46132.4143526003. The cubic root of 2128199654 is about 1286.2857432182.

The spelling of 2128199654 in words is "two billion, one hundred twenty-eight million, one hundred ninety-nine thousand, six hundred fifty-four".