2168495451 has 12 divisors (see below), whose sum is σ = 3132850240. Its totient is φ = 1445396400.

The previous prime is 2168495449. The next prime is 2168495471. The reversal of 2168495451 is 1545948612.

2168495451 is a `hidden beast` number, since 2 + 1 + 68 + 49 + 545 + 1 = 666.

It is not a de Polignac number, because 2168495451 - 2¹ = 2168495449 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2168495397 and 2168495406.

It is not an unprimeable number, because it can be changed into a prime (2168495471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 37590 + ... + 75828.

Almost surely, 2^2168495451 is an apocalyptic number.

2168495451 is a deficient number, since it is larger than the sum of its proper divisors (964354789).

2168495451 is a wasteful number, since it uses less digits than its factorization.

2168495451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44546 (or 44543 counting only the distinct ones).

The product of its digits is 345600, while the sum is 45.

The square root of 2168495451 is about 46567.1069640363. The cubic root of 2168495451 is about 1294.3533094875.

The spelling of 2168495451 in words is "two billion, one hundred sixty-eight million, four hundred ninety-five thousand, four hundred fifty-one".