54454136521 has 4 divisors (see below), whose sum is σ = 54454612500. Its totient is φ = 54453660544.

The previous prime is 54454136497. The next prime is 54454136531. The reversal of 54454136521 is 12563145445.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 15028062921 + 39426073600 = 122589^2 + 198560^2 .

It is a cyclic number.

It is not a de Polignac number, because 54454136521 - 2³⁵ = 20094398153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (54454136531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48885 + ... + 333613.

It is an arithmetic number, because the mean of its divisors is an integer number (13613653125).

Almost surely, 2^54454136521 is an apocalyptic number.

It is an amenable number.

54454136521 is a deficient number, since it is larger than the sum of its proper divisors (475979).

54454136521 is a wasteful number, since it uses less digits than its factorization.

54454136521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 475978.

The product of its digits is 288000, while the sum is 40.

The spelling of 54454136521 in words is "fifty-four billion, four hundred fifty-four million, one hundred thirty-six thousand, five hundred twenty-one".