53646644 has 6 divisors (see below), whose sum is σ = 93881634. Its totient is φ = 26823320.

The previous prime is 53646643. The next prime is 53646661. The reversal of 53646644 is 44664635.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 32376100 + 21270544 = 5690^2 + 4612^2 .

It is a junction number, because it is equal to n+sod(n) for n = 53646598 and 53646607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53646643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6705827 + ... + 6705834.

It is an arithmetic number, because the mean of its divisors is an integer number (15646939).

Almost surely, 2^53646644 is an apocalyptic number.

It is an amenable number.

53646644 is a deficient number, since it is larger than the sum of its proper divisors (40234990).

53646644 is a wasteful number, since it uses less digits than its factorization.

53646644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13411665 (or 13411663 counting only the distinct ones).

The product of its digits is 207360, while the sum is 38.

The square root of 53646644 is about 7324.3869368023. The cubic root of 53646644 is about 377.1500644420.

Subtracting from 53646644 its reverse (44664635), we obtain a square (8982009 = 2997²).

The spelling of 53646644 in words is "fifty-three million, six hundred forty-six thousand, six hundred forty-four".