533806720638 has 8 divisors (see below), whose sum is σ = 1067613441288. Its totient is φ = 177935573544.

The previous prime is 533806720609. The next prime is 533806720673. The reversal of 533806720638 is 836027608335.

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

533806720638 is an admirable number.

It is a super-2 number, since 2×533806720638² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

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, 44483893381 + ... + 44483893392.

It is an arithmetic number, because the mean of its divisors is an integer number (133451680161).

Almost surely, 2^533806720638 is an apocalyptic number.

533806720638 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

533806720638 is a wasteful number, since it uses less digits than its factorization.

533806720638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88967786778.

The product of its (nonzero) digits is 4354560, while the sum is 51.

The spelling of 533806720638 in words is "five hundred thirty-three billion, eight hundred six million, seven hundred twenty thousand, six hundred thirty-eight".