53440243465 has 64 divisors (see below), whose sum is σ = 76190123520. Its totient is φ = 35231293440.

The previous prime is 53440243399. The next prime is 53440243469. The reversal of 53440243465 is 56434204435.

It is not a de Polignac number, because 53440243465 - 2⁹ = 53440242953 is a prime.

It is not an unprimeable number, because it can be changed into a prime (53440243469) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 17187331 + ... + 17190439.

It is an arithmetic number, because the mean of its divisors is an integer number (1190470680).

Almost surely, 2^53440243465 is an apocalyptic number.

It is an amenable number.

53440243465 is a deficient number, since it is larger than the sum of its proper divisors (22749880055).

53440243465 is a wasteful number, since it uses less digits than its factorization.

53440243465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3362.

The product of its (nonzero) digits is 691200, while the sum is 40.

The spelling of 53440243465 in words is "fifty-three billion, four hundred forty million, two hundred forty-three thousand, four hundred sixty-five".