54405665 has 8 divisors (see below), whose sum is σ = 65410728. Its totient is φ = 43441920.

The previous prime is 54405629. The next prime is 54405677. The reversal of 54405665 is 56650445.

It can be written as a sum of positive squares in 4 ways, for example, as 289 + 54405376 = 17^2 + 7376^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 54405665 - 2⁶ = 54405601 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7352 + ... + 12761.

It is an arithmetic number, because the mean of its divisors is an integer number (8176341).

Almost surely, 2^54405665 is an apocalyptic number.

It is an amenable number.

54405665 is a deficient number, since it is larger than the sum of its proper divisors (11005063).

54405665 is a wasteful number, since it uses less digits than its factorization.

54405665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20659.

The product of its (nonzero) digits is 72000, while the sum is 35.

The square root of 54405665 is about 7376.0195905380. The cubic root of 54405665 is about 378.9204470516.

The spelling of 54405665 in words is "fifty-four million, four hundred five thousand, six hundred sixty-five".