54156284721 has 48 divisors (see below), whose sum is σ = 100786761600. Its totient is φ = 28133123040.

The previous prime is 54156284717. The next prime is 54156284759. The reversal of 54156284721 is 12748265145.

54156284721 is a `hidden beast` number, since 5 + 4 + 1 + 562 + 84 + 7 + 2 + 1 = 666.

It is not a de Polignac number, because 54156284721 - 2² = 54156284717 is a prime.

It is not an unprimeable number, because it can be changed into a prime (54156284711) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1161186 + ... + 1206923.

It is an arithmetic number, because the mean of its divisors is an integer number (2099724200).

Almost surely, 2^54156284721 is an apocalyptic number.

It is an amenable number.

54156284721 is a deficient number, since it is larger than the sum of its proper divisors (46630476879).

54156284721 is a wasteful number, since it uses less digits than its factorization.

54156284721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2368147 (or 2368130 counting only the distinct ones).

The product of its digits is 537600, while the sum is 45.

The spelling of 54156284721 in words is "fifty-four billion, one hundred fifty-six million, two hundred eighty-four thousand, seven hundred twenty-one".