54642824581 has 2 divisors, whose sum is σ = 54642824582. Its totient is φ = 54642824580.

The previous prime is 54642824573. The next prime is 54642824611. The reversal of 54642824581 is 18542824645.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 42298503556 + 12344321025 = 205666^2 + 111105^2 .

It is a cyclic number.

It is not a de Polignac number, because 54642824581 - 2³ = 54642824573 is a prime.

It is a super-2 number, since 2×54642824581² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (54642824531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27321412290 + 27321412291.

It is an arithmetic number, because the mean of its divisors is an integer number (27321412291).

Almost surely, 2^54642824581 is an apocalyptic number.

It is an amenable number.

54642824581 is a deficient number, since it is larger than the sum of its proper divisors (1).

54642824581 is an equidigital number, since it uses as much as digits as its factorization.

54642824581 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2457600, while the sum is 49.

The spelling of 54642824581 in words is "fifty-four billion, six hundred forty-two million, eight hundred twenty-four thousand, five hundred eighty-one".