264001638538 has 8 divisors (see below), whose sum is σ = 432002681280. Its totient is φ = 120000744780.

The previous prime is 264001638437. The next prime is 264001638557. The reversal of 264001638538 is 835836100462.

264001638538 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6000037218 + ... + 6000037261.

It is an arithmetic number, because the mean of its divisors is an integer number (54000335160).

Almost surely, 2^264001638538 is an apocalyptic number.

264001638538 is a deficient number, since it is larger than the sum of its proper divisors (168001042742).

264001638538 is a wasteful number, since it uses less digits than its factorization.

264001638538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12000074492.

The product of its (nonzero) digits is 829440, while the sum is 46.

The spelling of 264001638538 in words is "two hundred sixty-four billion, one million, six hundred thirty-eight thousand, five hundred thirty-eight".