54136246581 has 48 divisors (see below), whose sum is σ = 83824865280. Its totient is φ = 33547783680.

The previous prime is 54136246529. The next prime is 54136246583. The reversal of 54136246581 is 18564263145.

54136246581 is a `hidden beast` number, since 5 + 4 + 1 + 3 + 62 + 4 + 6 + 581 = 666.

It is not a de Polignac number, because 54136246581 - 2⁶ = 54136246517 is a prime.

It is a super-2 number, since 2×54136246581² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (54136246583) 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 47 ways as a sum of consecutive naturals, for example, 6125836 + ... + 6134666.

It is an arithmetic number, because the mean of its divisors is an integer number (1746351360).

Almost surely, 2^54136246581 is an apocalyptic number.

54136246581 is a gapful number since it is divisible by the number (51) formed by its first and last digit.

It is an amenable number.

54136246581 is a deficient number, since it is larger than the sum of its proper divisors (29688618699).

54136246581 is a wasteful number, since it uses less digits than its factorization.

54136246581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9346 (or 9343 counting only the distinct ones).

The product of its digits is 691200, while the sum is 45.

The spelling of 54136246581 in words is "fifty-four billion, one hundred thirty-six million, two hundred forty-six thousand, five hundred eighty-one".