2533763681 has 4 divisors (see below), whose sum is σ = 2533876500. Its totient is φ = 2533650864.

The previous prime is 2533763671. The next prime is 2533763711. The reversal of 2533763681 is 1863673352.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 1916688400 + 617075281 = 43780^2 + 24841^2 .

It is a cyclic number.

It is not a de Polignac number, because 2533763681 - 2¹⁴ = 2533747297 is a prime.

It is a super-2 number, since 2×2533763681² = 12839916782309339522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2533763621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9986 + ... + 71883.

It is an arithmetic number, because the mean of its divisors is an integer number (633469125).

Almost surely, 2^2533763681 is an apocalyptic number.

It is an amenable number.

2533763681 is a deficient number, since it is larger than the sum of its proper divisors (112819).

2533763681 is an equidigital number, since it uses as much as digits as its factorization.

2533763681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112818.

The product of its digits is 544320, while the sum is 44.

The square root of 2533763681 is about 50336.5044575008. The cubic root of 2533763681 is about 1363.2914224371.

The spelling of 2533763681 in words is "two billion, five hundred thirty-three million, seven hundred sixty-three thousand, six hundred eighty-one".