30640732521 has 8 divisors (see below), whose sum is σ = 46690640064. Its totient is φ = 17508990000.

The previous prime is 30640732487. The next prime is 30640732531. The reversal of 30640732521 is 12523704603.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 30640732521 - 2⁷ = 30640732393 is a prime.

It is not an unprimeable number, because it can be changed into a prime (30640732531) 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, 729541230 + ... + 729541271.

It is an arithmetic number, because the mean of its divisors is an integer number (5836330008).

Almost surely, 2^30640732521 is an apocalyptic number.

It is an amenable number.

30640732521 is a deficient number, since it is larger than the sum of its proper divisors (16049907543).

30640732521 is a wasteful number, since it uses less digits than its factorization.

30640732521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1459082511.

The product of its (nonzero) digits is 30240, while the sum is 33.

The spelling of 30640732521 in words is "thirty billion, six hundred forty million, seven hundred thirty-two thousand, five hundred twenty-one".