533913721636 has 27 divisors (see below), whose sum is σ = 992589947377. Its totient is φ = 251241824960.

The previous prime is 533913721631. The next prime is 533913721643. The reversal of 533913721636 is 636127319335.

The square root of 533913721636 is 730694.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 415676772900 + 118236948736 = 644730^2 + 343856^2 .

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 533913721636.

It is not an unprimeable number, because it can be changed into a prime (533913721631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 24832851 + ... + 24854341.

Almost surely, 2^533913721636 is an apocalyptic number.

533913721636 is the 730694-th square number.

It is an amenable number.

533913721636 is a deficient number, since it is larger than the sum of its proper divisors (458676225741).

533913721636 is an frugal number, since it uses more digits than its factorization.

533913721636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43020 (or 21510 counting only the distinct ones).

The product of its digits is 1837080, while the sum is 49.

Multiplying 533913721636 by its sum of digits (49), we get a square (26161772360164 = 5114858²).

The spelling of 533913721636 in words is "five hundred thirty-three billion, nine hundred thirteen million, seven hundred twenty-one thousand, six hundred thirty-six".