254891849821 has 8 divisors (see below), whose sum is σ = 292555209024. Its totient is φ = 217541050080.

The previous prime is 254891849803. The next prime is 254891849827. The reversal of 254891849821 is 128948198452.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 254891849821 - 2⁹ = 254891849309 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 254891849821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (254891849827) by changing a digit.

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, 78138115 + ... + 78141376.

It is an arithmetic number, because the mean of its divisors is an integer number (36569401128).

Almost surely, 2^254891849821 is an apocalyptic number.

It is an amenable number.

254891849821 is a deficient number, since it is larger than the sum of its proper divisors (37663359203).

254891849821 is a wasteful number, since it uses less digits than its factorization.

254891849821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156279731.

The product of its digits is 13271040, while the sum is 61.

The spelling of 254891849821 in words is "two hundred fifty-four billion, eight hundred ninety-one million, eight hundred forty-nine thousand, eight hundred twenty-one".