2640533472 has 48 divisors (see below), whose sum is σ = 7701558480. Its totient is φ = 880177536.

The previous prime is 2640533447. The next prime is 2640533473. The reversal of 2640533472 is 2743350462.

2640533472 is a `hidden beast` number, since 2 + 640 + 5 + 3 + 3 + 4 + 7 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2640533473) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1527223 + ... + 1528950.

It is an arithmetic number, because the mean of its divisors is an integer number (160449135).

Almost surely, 2^2640533472 is an apocalyptic number.

It is an amenable number.

2640533472 is an abundant number, since it is smaller than the sum of its proper divisors (5061025008).

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

2640533472 is a wasteful number, since it uses less digits than its factorization.

2640533472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3056192 (or 3056178 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 36.

The square root of 2640533472 is about 51386.1213947891. The cubic root of 2640533472 is about 1382.1777336036.

The spelling of 2640533472 in words is "two billion, six hundred forty million, five hundred thirty-three thousand, four hundred seventy-two".