254123440520 has 32 divisors (see below), whose sum is σ = 596637645120. Its totient is φ = 97229837760.

The previous prime is 254123440429. The next prime is 254123440531. The reversal of 254123440520 is 25044321452.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 138109646 + ... + 138111485.

It is an arithmetic number, because the mean of its divisors is an integer number (18644926410).

Almost surely, 2^254123440520 is an apocalyptic number.

254123440520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

254123440520 is an abundant number, since it is smaller than the sum of its proper divisors (342514204600).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

254123440520 is a wasteful number, since it uses less digits than its factorization.

254123440520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 276221165 (or 276221161 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 32.

Adding to 254123440520 its reverse (25044321452), we get a palindrome (279167761972).

The spelling of 254123440520 in words is "two hundred fifty-four billion, one hundred twenty-three million, four hundred forty thousand, five hundred twenty".