53645660 has 48 divisors (see below), whose sum is σ = 118540800. Its totient is φ = 20353344.

The previous prime is 53645653. The next prime is 53645707. The reversal of 53645660 is 6654635.

It is a self number, because there is not a number n which added to its sum of digits gives 53645660.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 63521 + ... + 64359.

It is an arithmetic number, because the mean of its divisors is an integer number (2469600).

Almost surely, 2^53645660 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 53645660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (59270400).

53645660 is an abundant number, since it is smaller than the sum of its proper divisors (64895140).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

53645660 is a wasteful number, since it uses less digits than its factorization.

53645660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1010 (or 1008 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 35.

The square root of 53645660 is about 7324.3197636368. The cubic root of 53645660 is about 377.1477585014.

Subtracting from 53645660 its reverse (6654635), we obtain a square (46991025 = 6855²).

The spelling of 53645660 in words is "fifty-three million, six hundred forty-five thousand, six hundred sixty".