533768781 has 16 divisors (see below), whose sum is σ = 875928704. Its totient is φ = 281548224.

The previous prime is 533768779. The next prime is 533768783. The reversal of 533768781 is 187867335.

It is an interprime number because it is at equal distance from previous prime (533768779) and next prime (533768783).

It is not a de Polignac number, because 533768781 - 2¹ = 533768779 is a prime.

It is a super-2 number, since 2×533768781² = 569818223140451922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 533768781.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (533768783) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 977326 + ... + 977871.

It is an arithmetic number, because the mean of its divisors is an integer number (54745544).

Almost surely, 2^533768781 is an apocalyptic number.

It is an amenable number.

533768781 is a deficient number, since it is larger than the sum of its proper divisors (342159923).

533768781 is a wasteful number, since it uses less digits than its factorization.

533768781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1955220.

The product of its digits is 846720, while the sum is 48.

The square root of 533768781 is about 23103.4365625549. The cubic root of 533768781 is about 811.1809127596.

The spelling of 533768781 in words is "five hundred thirty-three million, seven hundred sixty-eight thousand, seven hundred eighty-one".