254145551643 has 20 divisors (see below), whose sum is σ = 380530437408. Its totient is φ = 169037234640.

The previous prime is 254145551623. The next prime is 254145551683. The reversal of 254145551643 is 346155541452.

254145551643 is a `hidden beast` number, since 2 + 5 + 41 + 4 + 55 + 516 + 43 = 666.

254145551643 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 254145551643 - 2⁶ = 254145551579 is a prime.

It is a super-2 number, since 2×254145551643² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (254145551623) 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 19 ways as a sum of consecutive naturals, for example, 3604996 + ... + 3674817.

Almost surely, 2^254145551643 is an apocalyptic number.

254145551643 is a deficient number, since it is larger than the sum of its proper divisors (126384885765).

254145551643 is an equidigital number, since it uses as much as digits as its factorization.

254145551643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7280256 (or 7280247 counting only the distinct ones).

The product of its digits is 1440000, while the sum is 45.

The spelling of 254145551643 in words is "two hundred fifty-four billion, one hundred forty-five million, five hundred fifty-one thousand, six hundred forty-three".