54857631382821 has 24 divisors (see below), whose sum is σ = 80925200703360. Its totient is φ = 35793424876416.

The previous prime is 54857631382783. The next prime is 54857631382847. The reversal of 54857631382821 is 12828313675845.

54857631382821 is a `hidden beast` number, since 5 + 4 + 8 + 576 + 3 + 1 + 38 + 2 + 8 + 21 = 666.

It is not a de Polignac number, because 54857631382821 - 2⁷ = 54857631382693 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (54857631381821) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 114249181 + ... + 114728333.

It is an arithmetic number, because the mean of its divisors is an integer number (3371883362640).

Almost surely, 2^{54857631382821} is an apocalyptic number.

It is an amenable number.

54857631382821 is a deficient number, since it is larger than the sum of its proper divisors (26067569320539).

54857631382821 is a wasteful number, since it uses less digits than its factorization.

54857631382821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 749865 (or 749862 counting only the distinct ones).

The product of its digits is 77414400, while the sum is 63.

The spelling of 54857631382821 in words is "fifty-four trillion, eight hundred fifty-seven billion, six hundred thirty-one million, three hundred eighty-two thousand, eight hundred twenty-one".