53644647 has 16 divisors (see below), whose sum is σ = 81930240. Its totient is φ = 30584352.

The previous prime is 53644637. The next prime is 53644667. The reversal of 53644647 is 74644635.

It is a happy number.

It is not a de Polignac number, because 53644647 - 2¹⁵ = 53611879 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53644627) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7393 + ... + 12725.

It is an arithmetic number, because the mean of its divisors is an integer number (5120640).

Almost surely, 2^53644647 is an apocalyptic number.

53644647 is a deficient number, since it is larger than the sum of its proper divisors (28285593).

53644647 is a wasteful number, since it uses less digits than its factorization.

53644647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5822.

The product of its digits is 241920, while the sum is 39.

The square root of 53644647 is about 7324.2506101307. The cubic root of 53644647 is about 377.1453845716.

It can be divided in two parts, 5364 and 4647, that added together give a triangular number (10011 = T₁₄₁).

The spelling of 53644647 in words is "fifty-three million, six hundred forty-four thousand, six hundred forty-seven".