54153681781 has 8 divisors (see below), whose sum is σ = 57354338304. Its totient is φ = 50954708160.

The previous prime is 54153681779. The next prime is 54153681809. The reversal of 54153681781 is 18718635145.

It is a happy number.

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 54153681781 - 2¹ = 54153681779 is a prime.

It is a super-2 number, since 2×54153681781² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (54153631781) 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, 354165 + ... + 483466.

It is an arithmetic number, because the mean of its divisors is an integer number (7169292288).

Almost surely, 2^54153681781 is an apocalyptic number.

It is an amenable number.

54153681781 is a deficient number, since it is larger than the sum of its proper divisors (3200656523).

54153681781 is a wasteful number, since it uses less digits than its factorization.

54153681781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 841451.

The product of its digits is 806400, while the sum is 49.

The spelling of 54153681781 in words is "fifty-four billion, one hundred fifty-three million, six hundred eighty-one thousand, seven hundred eighty-one".