538025333257481 has 4 divisors (see below), whose sum is σ = 551147902361364. Its totient is φ = 524902764153600.

The previous prime is 538025333257441. The next prime is 538025333257487. The reversal of 538025333257481 is 184752333520835.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 163723412748025 + 374301920509456 = 12795445^2 + 19346884^2 .

It is a cyclic number.

It is not a de Polignac number, because 538025333257481 - 2³⁴ = 538008153388297 is a prime.

It is a super-2 number, since 2×538025333257481² (a number of 30 digits) contains 22 as substring.

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 538025333257481.

It is not an unprimeable number, because it can be changed into a prime (538025333257487) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6561284551880 + ... + 6561284551961.

It is an arithmetic number, because the mean of its divisors is an integer number (137786975590341).

Almost surely, 2^{538025333257481} is an apocalyptic number.

It is an amenable number.

538025333257481 is a deficient number, since it is larger than the sum of its proper divisors (13122569103883).

538025333257481 is a wasteful number, since it uses less digits than its factorization.

538025333257481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13122569103882.

The product of its (nonzero) digits is 72576000, while the sum is 59.

The spelling of 538025333257481 in words is "five hundred thirty-eight trillion, twenty-five billion, three hundred thirty-three million, two hundred fifty-seven thousand, four hundred eighty-one".