254134544015521 has 16 divisors (see below), whose sum is σ = 274221434672640. Its totient is φ = 234124896732480.

The previous prime is 254134544015501. The next prime is 254134544015563. The reversal of 254134544015521 is 125510445431452.

It is not a de Polignac number, because 254134544015521 - 2²³ = 254134535626913 is a prime.

It is not an unprimeable number, because it can be changed into a prime (254134544015501) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8464716 + ... + 24081538.

It is an arithmetic number, because the mean of its divisors is an integer number (17138839667040).

Almost surely, 2^{254134544015521} is an apocalyptic number.

It is an amenable number.

254134544015521 is a deficient number, since it is larger than the sum of its proper divisors (20086890657119).

254134544015521 is a wasteful number, since it uses less digits than its factorization.

254134544015521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15619296.

The product of its (nonzero) digits is 1920000, while the sum is 46.

Adding to 254134544015521 its reverse (125510445431452), we get a palindrome (379644989446973).

The spelling of 254134544015521 in words is "two hundred fifty-four trillion, one hundred thirty-four billion, five hundred forty-four million, fifteen thousand, five hundred twenty-one".