54945133821 has 24 divisors (see below), whose sum is σ = 79558519040. Its totient is φ = 36540979200.

The previous prime is 54945133813. The next prime is 54945133843. The reversal of 54945133821 is 12833154945.

54945133821 is a `hidden beast` number, since 5 + 494 + 5 + 133 + 8 + 21 = 666.

It is not a de Polignac number, because 54945133821 - 2³ = 54945133813 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (54945133811) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6854706 + ... + 6862716.

Almost surely, 2^54945133821 is an apocalyptic number.

It is an amenable number.

54945133821 is a deficient number, since it is larger than the sum of its proper divisors (24613385219).

54945133821 is a wasteful number, since it uses less digits than its factorization.

54945133821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9777 (or 9774 counting only the distinct ones).

The product of its digits is 518400, while the sum is 45.

It can be divided in two parts, 5494 and 5133821, that added together give a palindrome (5139315).

The spelling of 54945133821 in words is "fifty-four billion, nine hundred forty-five million, one hundred thirty-three thousand, eight hundred twenty-one".