54121821609 has 16 divisors (see below), whose sum is σ = 72650096064. Its totient is φ = 35837870400.

The previous prime is 54121821599. The next prime is 54121821629. The reversal of 54121821609 is 90612812145.

It is not a de Polignac number, because 54121821609 - 2⁵ = 54121821577 is a prime.

It is not an unprimeable number, because it can be changed into a prime (54121821629) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 385102 + ... + 506504.

It is an arithmetic number, because the mean of its divisors is an integer number (4540631004).

Almost surely, 2^54121821609 is an apocalyptic number.

It is an amenable number.

54121821609 is a deficient number, since it is larger than the sum of its proper divisors (18528274455).

54121821609 is a wasteful number, since it uses less digits than its factorization.

54121821609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122408.

The product of its (nonzero) digits is 34560, while the sum is 39.

The spelling of 54121821609 in words is "fifty-four billion, one hundred twenty-one million, eight hundred twenty-one thousand, six hundred nine".