53414450665 has 4 divisors (see below), whose sum is σ = 64097340804. Its totient is φ = 42731560528.

The previous prime is 53414450651. The next prime is 53414450689. The reversal of 53414450665 is 56605441435.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 56605441435 = 5 ⋅11321088287.

It can be written as a sum of positive squares in 2 ways, for example, as 10979686656 + 42434764009 = 104784^2 + 205997^2 .

It is a cyclic number.

It is not a de Polignac number, because 53414450665 - 2⁹ = 53414450153 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5341445062 + ... + 5341445071.

It is an arithmetic number, because the mean of its divisors is an integer number (16024335201).

Almost surely, 2^53414450665 is an apocalyptic number.

It is an amenable number.

53414450665 is a deficient number, since it is larger than the sum of its proper divisors (10682890139).

53414450665 is a wasteful number, since it uses less digits than its factorization.

53414450665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10682890138.

The product of its (nonzero) digits is 864000, while the sum is 43.

The spelling of 53414450665 in words is "fifty-three billion, four hundred fourteen million, four hundred fifty thousand, six hundred sixty-five".