32640553 has 4 divisors (see below), whose sum is σ = 35607888. Its totient is φ = 29673220.

The previous prime is 32640529. The next prime is 32640581. The reversal of 32640553 is 35504623.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 32640553 - 2¹⁷ = 32509481 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (32640583) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1483651 + ... + 1483672.

It is an arithmetic number, because the mean of its divisors is an integer number (8901972).

Almost surely, 2^32640553 is an apocalyptic number.

It is an amenable number.

32640553 is a deficient number, since it is larger than the sum of its proper divisors (2967335).

32640553 is a wasteful number, since it uses less digits than its factorization.

32640553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2967334.

The product of its (nonzero) digits is 10800, while the sum is 28.

The square root of 32640553 is about 5713.1911398097. The cubic root of 32640553 is about 319.5845944413.

The spelling of 32640553 in words is "thirty-two million, six hundred forty thousand, five hundred fifty-three".