53624642165 has 4 divisors (see below), whose sum is σ = 64349570604. Its totient is φ = 42899713728.

The previous prime is 53624642119. The next prime is 53624642167. The reversal of 53624642165 is 56124642635.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 56124642635 = 5 ⋅11224928527.

It can be written as a sum of positive squares in 2 ways, for example, as 6491363761 + 47133278404 = 80569^2 + 217102^2 .

It is a cyclic number.

It is not a de Polignac number, because 53624642165 - 2¹⁸ = 53624380021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53624642167) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5362464212 + ... + 5362464221.

It is an arithmetic number, because the mean of its divisors is an integer number (16087392651).

Almost surely, 2^53624642165 is an apocalyptic number.

It is an amenable number.

53624642165 is a deficient number, since it is larger than the sum of its proper divisors (10724928439).

53624642165 is a wasteful number, since it uses less digits than its factorization.

53624642165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10724928438.

The product of its digits is 1036800, while the sum is 44.

The spelling of 53624642165 in words is "fifty-three billion, six hundred twenty-four million, six hundred forty-two thousand, one hundred sixty-five".