2154561453 has 36 divisors (see below), whose sum is σ = 3622040604. Its totient is φ = 1228972800.

The previous prime is 2154561433. The next prime is 2154561481. The reversal of 2154561453 is 3541654512.

2154561453 is a `hidden beast` number, since 2 + 1 + 54 + 561 + 45 + 3 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1996481124 + 158080329 = 44682^2 + 12573^2 .

It is not a de Polignac number, because 2154561453 - 2⁵ = 2154561421 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2154561433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 39678 + ... + 76703.

It is an arithmetic number, because the mean of its divisors is an integer number (100612239).

Almost surely, 2^2154561453 is an apocalyptic number.

It is an amenable number.

2154561453 is a deficient number, since it is larger than the sum of its proper divisors (1467479151).

2154561453 is a wasteful number, since it uses less digits than its factorization.

2154561453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116426 (or 116412 counting only the distinct ones).

The product of its digits is 72000, while the sum is 36.

The square root of 2154561453 is about 46417.2538287219. The cubic root of 2154561453 is about 1291.5749953191.

The spelling of 2154561453 in words is "two billion, one hundred fifty-four million, five hundred sixty-one thousand, four hundred fifty-three".