54578423721 has 16 divisors (see below), whose sum is σ = 79134378624. Its totient is φ = 33319736064.

The previous prime is 54578423701. The next prime is 54578423741. The reversal of 54578423721 is 12732487545.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (54578423701) and next prime (54578423741).

It is not a de Polignac number, because 54578423721 - 2¹⁵ = 54578390953 is a prime.

It is a super-3 number, since 3×54578423721³ (a number of 33 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (54578423701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14459805 + ... + 14463578.

It is an arithmetic number, because the mean of its divisors is an integer number (4945898664).

Almost surely, 2^54578423721 is an apocalyptic number.

54578423721 is a gapful number since it is divisible by the number (51) formed by its first and last digit.

It is an amenable number.

54578423721 is a deficient number, since it is larger than the sum of its proper divisors (24555954903).

54578423721 is a wasteful number, since it uses less digits than its factorization.

54578423721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28923440.

The product of its digits is 1881600, while the sum is 48.

The spelling of 54578423721 in words is "fifty-four billion, five hundred seventy-eight million, four hundred twenty-three thousand, seven hundred twenty-one".