52643645 has 16 divisors (see below), whose sum is σ = 67255920. Its totient is φ = 39419904.

The previous prime is 52643641. The next prime is 52643651. The reversal of 52643645 is 54634625.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 37636 + 52606009 = 194^2 + 7253^2 .

It is a cyclic number.

It is not a de Polignac number, because 52643645 - 2² = 52643641 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52643641) 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, 14801 + ... + 18009.

It is an arithmetic number, because the mean of its divisors is an integer number (4203495).

Almost surely, 2^52643645 is an apocalyptic number.

It is an amenable number.

52643645 is a deficient number, since it is larger than the sum of its proper divisors (14612275).

52643645 is a wasteful number, since it uses less digits than its factorization.

52643645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3424.

The product of its digits is 86400, while the sum is 35.

The square root of 52643645 is about 7255.5940487323. The cubic root of 52643645 is about 374.7848128385.

The spelling of 52643645 in words is "fifty-two million, six hundred forty-three thousand, six hundred forty-five".