2721521688 has 32 divisors (see below), whose sum is σ = 6805766400. Its totient is φ = 906912288.

The previous prime is 2721521683. The next prime is 2721521711. The reversal of 2721521688 is 8861251272.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2721521683) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 80253 + ... + 109011.

It is an arithmetic number, because the mean of its divisors is an integer number (212680200).

Almost surely, 2^2721521688 is an apocalyptic number.

It is an amenable number.

2721521688 is an abundant number, since it is smaller than the sum of its proper divisors (4084244712).

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

2721521688 is a wasteful number, since it uses less digits than its factorization.

2721521688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32711 (or 32707 counting only the distinct ones).

The product of its digits is 107520, while the sum is 42.

The square root of 2721521688 is about 52168.2057195760. The cubic root of 2721521688 is about 1396.1666713970.

The spelling of 2721521688 in words is "two billion, seven hundred twenty-one million, five hundred twenty-one thousand, six hundred eighty-eight".