53988440465 has 4 divisors (see below), whose sum is σ = 64786128564. Its totient is φ = 43190752368.

The previous prime is 53988440453. The next prime is 53988440479. The reversal of 53988440465 is 56404488935.

53988440465 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 25653788224 + 28334652241 = 160168^2 + 168329^2 .

It is a cyclic number.

It is not a de Polignac number, because 53988440465 - 2²⁰ = 53987391889 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 53988440465.

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, 5398844042 + ... + 5398844051.

It is an arithmetic number, because the mean of its divisors is an integer number (16196532141).

Almost surely, 2^53988440465 is an apocalyptic number.

It is an amenable number.

53988440465 is a deficient number, since it is larger than the sum of its proper divisors (10797688099).

53988440465 is a wasteful number, since it uses less digits than its factorization.

53988440465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10797688098.

The product of its (nonzero) digits is 16588800, while the sum is 56.

The spelling of 53988440465 in words is "fifty-three billion, nine hundred eighty-eight million, four hundred forty thousand, four hundred sixty-five".